Dyfyniad APA

Enger, E. D., & Kormelink, J. R. (1991). Concepts in biology (6th ed.). WCB.

Dyfyniad Arddull Chicago

Enger, Eldon D., and J. Richard Kormelink. Concepts in Biology. 6th ed. Boulevard: WCB, 1991.

Dyfyniad MLA

Enger, Eldon D., and J. Richard Kormelink. Concepts in Biology. 6th ed. WCB, 1991.

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