APA (7th ed.) Citation

Zimmerman, D. R. (1983). The essential guide to nonprescription drugs. Harper & Row.

Chicago Style (17th ed.) Citation

Zimmerman, David R. The Essential Guide to Nonprescription Drugs. New York: Harper & Row, 1983.

MLA (9th ed.) Citation

Zimmerman, David R. The Essential Guide to Nonprescription Drugs. Harper & Row, 1983.