ACS (American Chemical Society) Guide to Scholarly Communication is a numbered referencing style.
Information for this guide was from Part 4.3 References and Part 4.3.3. ACS Style Quick Guide of The ACS guide to scholarly communication (2020-). Latest update 8 April 2025. Consult the manual for more comprehensive information.
In ACS, you reference by providing a citation within the text of the document (in-text citation) using a superscript or parenthetical number.
You then add the related entry to the references list at the end of your document. The reference list entry (author, title, source and date) provides the full details of the reference.
When the bell rang, the children knew that it was time for tea.1
1. Jones, B. Surviving teatime. Bloomsday Books: Wellington, New Zealand, 2023.