Examples on this page are based on the 3rd edition of the ACS Style Guide: Effective Communication of Scientific Information (2006). Remember, your professor is the final authority for the bibliographic form, including spacing used in your paper.
There are three ways to cite references in-text using ACS Style. Select ONE in-text style to use consistently throughout your paper.
Superscript numbers - References are listed at the end of the paper in the order they appear in the paper
Example: Smith et al. discovered similar results1
Italicized numbers in parentheses - References are listed at the end of the paper in the order they appear in the paper.
Example: Weber and Mathews reported related findings (9). Another recent study (10) indicates that...
Author and date in parentheses - References are listed at the end of the paper in alphabetical order by the author's last name.
Example: ... the binding behavior of BaP-linker haptens (Chen and Pellequer, 2004). Smith (1998) draws similar conclusions.