Gaya APA

convention, T, U, S, P. (2005). The United States Pharmacopeia 28: The National Formulary 23 . Rockville: The United States Pharmacopeial Convention.

Gaya MLA

convention, The, United, States, Pharmacopeial. "The United States Pharmacopeia 28: The National Formulary 23". Rockville: The United States Pharmacopeial Convention, 2005. Text.