Dyfyniad APA

WHO. (2011). The international pharmacopoeia (4th ed.). World Health Organization.

Dyfyniad Arddull Chicago

WHO. The International Pharmacopoeia. 4th ed. Geneva: World Health Organization, 2011.

Dyfyniad MLA

WHO. The International Pharmacopoeia. 4th ed. World Health Organization, 2011.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.