Cita APA (7th ed.)

Long, J. W. (1991). The essential guide to prescription drugs (1991 ed.). HarperCollins.

Cita Chicago (17th ed.)

Long, James W. The Essential Guide to Prescription Drugs. 1991 ed. New York: HarperCollins, 1991.

Cita MLA (8th ed.)

Long, James W. The Essential Guide to Prescription Drugs. 1991 ed. HarperCollins, 1991.