Dyfyniad APA

Nelson, G. E. (1980). Biological principles with human perspectives. Wiley.

Dyfyniad Arddull Chicago

Nelson, Gideon E. Biological Principles with Human Perspectives. New York: Wiley, 1980.

Dyfyniad MLA

Nelson, Gideon E. Biological Principles with Human Perspectives. Wiley, 1980.

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