Dyfyniad APA

Foley, H. (1973). The pitcher plant. Hodder and Stoughton.

Dyfyniad Arddull Chicago

Foley, Helen. The Pitcher Plant. London: Hodder and Stoughton, 1973.

Dyfyniad MLA

Foley, Helen. The Pitcher Plant. Hodder and Stoughton, 1973.

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