The United States Pharmacopeial Convention. (2001). The United States Pharmacopeia: The National Formulary, USP:25 y NF:20 (Twentieth Edition.). The United States Pharmaopeial Convention.
Cita Chicago Style (17a ed.)The United States Pharmacopeial Convention. The United States Pharmacopeia: The National Formulary, USP:25 Y NF:20. Twentieth Edition. (s.i.): The United States Pharmaopeial Convention, 2001.
Cita MLA (9a ed.)The United States Pharmacopeial Convention. The United States Pharmacopeia: The National Formulary, USP:25 Y NF:20. Twentieth Edition. The United States Pharmaopeial Convention, 2001.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.