Dyfyniad APA

(2010). British pharmacopoeia 2011. The Stationery Office.

Dyfyniad Arddull Chicago

British Pharmacopoeia 2011. London: The Stationery Office, 2010.

Dyfyniad MLA

British Pharmacopoeia 2011. The Stationery Office, 2010.

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