Dyfyniad APA

Charles William Evans & Edward George Trease. (1983). Pharmacognosy (12.). Bailliere Tindall.

Dyfyniad Arddull Chicago

Charles William Evans and Edward George Trease. Pharmacognosy. 12. Bailliere Tindall, 1983.

Dyfyniad MLA

Charles William Evans and Edward George Trease. Pharmacognosy. 12. Bailliere Tindall, 1983.

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