In the ACS Style Quick Guide you will find examples of how to cite:
Another excellent resource is the University of Wisconsin, Madison Library's ACS Style Guide
And if you have an obscure source and aren't sure how to cite it, you may want to consult the ACS Style Guide: Effective Communication of Scientific Information
Use this online index to:
The ACS Guide to Scholarly Communication is an excellent online resource for information on communicating in a scientific environment and conventions within the American Chemical Society specifically. Some of the topics covered include:
Chemical structures and chemical compound nomenclature
See Section 4.3 for information on citation styles, reference formatting, etc.
See Section 6.1 for the ACS Inclusivity Style Guide