APA (7th ed.) Citation

United States Pharmacopeial Convention, United States Pharmacopeial Convention. Committee Revision, & United States Pharmacopeial Convention. Board of Trustees. (1979). The United States pharmacopeia (20. ed. revision.). United States Pharmacopeial Convention.

Chicago Style (17th ed.) Citation

United States Pharmacopeial Convention, United States Pharmacopeial Convention. Committee Revision, and United States Pharmacopeial Convention. Board of Trustees. The United States Pharmacopeia. 20. ed. revision. Rockville, Md.: United States Pharmacopeial Convention, 1979.

MLA (9th ed.) Citation

United States Pharmacopeial Convention, et al. The United States Pharmacopeia. 20. ed. revision. United States Pharmacopeial Convention, 1979.