Cita APA

(1985). USP XXI: The Pharmacopeia of the United States of America (Twenty First rev.). Rockville: Pharmacopeial of the United States of America.

Citación estilo Chicago

USP XXI: The Pharmacopeia of the United States of America. Twenty First rev. Rockville: Pharmacopeial of the United States of America, 1985.

Cita MLA

USP XXI: The Pharmacopeia of the United States of America. Twenty First rev. Rockville: Pharmacopeial of the United States of America, 1985.