Gaya APA

Cohen, J, L., Till, A. (2000). US. Pharmacopeia 24 National Formulary 19 Supplenment vol.4 (Volume 4). Washington: United States Pharmacopeial Convention.

Gaya MLA

Cohen, Jordan, L.., Till, Alice. "US. Pharmacopeia 24 National Formulary 19 Supplenment vol.4". Volume 4 Washington: United States Pharmacopeial Convention, 2000. Text.