Inline citation workbench
Turn one reference number—or a group of references—into a clean ACS in-text citation. The default output uses the unparenthesized superscript style common in current ACS journals, with parenthetical-number and author–date options available when your instructions call for them.
In-text tool
Choose the citation treatment required by your journal, course, or department. Add the matching reference number or author details and copy the live result.
Formatted in-text citation
Enter a reference number to create a citation.
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Keep the number tied to its existing full reference. Reusing a source normally means reusing its number—not creating a new one.
Citation and reference
An ACS in-text citation is the short marker inside your prose that sends a reader to a complete reference. In the numerical system, the number is assigned when a source first appears and the same number points to the same source every time it is cited again. Reference 4 should never become reference 9 simply because you mention it in a later paragraph. The number and the full entry work as a pair.
Current ACS journal instructions commonly call for Arabic numbers in order of first mention, presented as unparenthesized superscripts. A manuscript might therefore end a statement with punctuation followed by a raised 4. Several sources can be cited together, and a consecutive run can be shortened to a range. This generator sorts and deduplicates the numbers you enter, compresses runs of three or more, and produces rich HTML so compatible word processors can preserve the superscript treatment when pasted.
Courses, textbooks, and departments sometimes use an older parenthetical-number treatment or an author–date variant. Those systems change the visible marker and may change how the final reference list is ordered. They do not change the underlying responsibility: every in-text citation must point unambiguously to one complete and accurate reference. Check the instructions attached to the work you are actually submitting before choosing a mode.
Three treatments
Use one treatment consistently. Mixing superscripts, parenthetical numbers, and author–date citations in the same document makes the connection to the reference list unclear.
The reaction reached completion.¹–³
This is the default in the tool because it matches the reference guidance used by many current ACS journals. Numbers follow the order in which sources first appear and are raised above the text. Journal-specific instructions decide the final punctuation and grouping details.
The reaction reached completion (1–3).
Some courses and legacy ACS guidance use italic reference numbers inside parentheses. The same citation-order logic applies: the visible number must match the numbered reference list, and a reused source keeps its first assigned number.
The reaction reached completion (Tan et al., 2022).
The author–date option identifies a work using the first-author label and year. It is useful only when the required reference system also expects author–date citations and an appropriately arranged list. Do not switch to it merely because the surname is available.
Four checks
Identify the number already assigned to the source by its first appearance in your document.
Use the superscript default unless your journal, instructor, or department explicitly requests another system.
Enter one or more numbers, copy the formatted result, and place it beside the claim it supports.
Confirm that every marker opens the correct full reference and that no bibliography number is missing.
Placement rules
A correctly formatted number can still be ambiguous when it sits too far from the claim it supports. These checks make the relationship between evidence and statement easier to follow.
Review current ACS reference guidanceThe first new source cited becomes reference 1, the next new source becomes reference 2, and so on. Build the reference list in the same sequence.
When a source appears again, cite its existing reference number. Adding the same full reference twice creates a false impression that two different works were used.
Place the marker immediately after the statement, name, or clause it supports. Avoid collecting unrelated citations at the end of a long paragraph.
ACS journals may combine literature citations and explanatory notes in one consecutive series. Follow the target publication’s policy rather than inventing a second numbering sequence.
Submission guidelines can specify superscript placement, ranges, and treatment of supporting information. Those instructions take precedence over a general generator.
In-text FAQ
Many current ACS journals require unparenthesized superscript Arabic numbers assigned in order of first mention. Course and institutional guidance can request a parenthetical-number or author–date variation, so check the instructions for your specific document.
Current journal examples commonly place the superscript citation after punctuation. Journal instructions remain the final authority, especially around equations, tables, chemical structures, and explanatory notes.
Enter every matching reference number. The tool sorts and removes duplicates, separates nonconsecutive numbers, and compresses a run of three or more consecutive numbers into a range.
No. In the numbered system, reuse the number assigned when that source first appeared. The full reference should normally appear once in the reference list.
Author–date appears as an ACS variant in some educational and book contexts, but it is not the default for many ACS journal submissions. Use it only when your instructions specify that system and arrange the reference list accordingly.
This page creates the short marker used in your prose. Use the CiteLab journal, book, website, or bibliography generator for the complete reference that corresponds to the marker.