Gaya APA

Convention, U, S, P. (2004). USP 27 NF 22 The United States Pharmacopeia ; The National Formulary . Rockville: United States Pharmacopeial Convention.

Gaya MLA

Convention, United, States, Pharmacopeial. "USP 27 NF 22 The United States Pharmacopeia ; The National Formulary". Rockville: United States Pharmacopeial Convention, 2004. Text.