Gaya APA

Convention, U, S, P. (2004). USP 27 NF 22 : Official From Januari 1, 2004 . : Unied Pharmacopedia.

Gaya MLA

Convention, United, States, Pharmacopeial. "USP 27 NF 22 : Official From Januari 1, 2004". : Unied Pharmacopedia, 2004. Text.