You must cite sources anytime you use words, ideas, data, or images that are not common knowledge. ACS has 3 options for citing sources in the text. Use the first option, which involves superscript numbers:
Number your references in the order you use them, including a superscript number in a logical place (usually after punctuation) for each in-text citation when you quote or paraphrase from a source.
Oscillation in the reaction of benzaldehyde with oxygen was reported previously.1
Number your references in the order you use them, and include full citations following the examples below. The Works Cited list should be toward the end of your proposal (CV & materials/budget sheet will follow the Works Cited). Each numbered source in your Works Cited should correspond with the superscript in your text. Do not include sources in your Works Cited that aren't used in your text, or vice versa.
Cuartero, M.; Crespo, G. A.; Bakker, E. Paper-Based Thin-Layer Coulometric Sensor for Halide Determination. Anal. Chem. 2015, 87, 1981–1990.
Article with DOI
Safaei, T. S.; Mohamadi, R. M.; Sargent, E. H.; Kelley, S. O. In Situ Electrochemical ELISA for Specific Identification of Captured Cancer Cells. ACS Appl. Mater. Interfaces 2015, DOI:10.1021/acsami.5b02404.
Mackel, H. Capturing the Spectra of Silicon Solar Cells. Masters Thesis, Australian National University, December 2004.
Bard, A. J.; Faulker, L. R. Electrochemical Methods, 2nd ed.; Wiley: New York, 2001.
Francesconi, K. A.; Kuehnelt, D. Best Chapter in the World. In Environmental Chemistry of Arsenic; Frankenberger, W. T., Jr., Ed.; Marcel Dekker: New York, 2002; pp 51–94.
Green Chemistry: Meeting Global Challenges [DVD]; American Chemical Society: Washington, DC, 2003.
ACS Publications Division Home Page. http://pubs.acs.org (accessed Nov 7, 2018).
*use this example when citing an instrument manual, noting that a group or organization can be an author. This example should also work for some museum documents.
Tschantz, B.A.; Moran, B. M. Modeling of the Hydrologic Transport of Mercury; Technical Report for Lockheed Martin Energy Systems: Bethesda, MD, September 2004.
Some examples adapted from The ACS Style Guide p. 287, 292-293.