Dyfyniad APA

Rosenbaum, P. A., & Volpe, E. P. (2011). Volpe's understanding evolution (7th ed.). McGraw-Hill.

Dyfyniad Arddull Chicago

Rosenbaum, Peter Andrew, and E. Peter Volpe. Volpe's Understanding Evolution. 7th ed. New York: McGraw-Hill, 2011.

Dyfyniad MLA

Rosenbaum, Peter Andrew, and E. Peter Volpe. Volpe's Understanding Evolution. 7th ed. McGraw-Hill, 2011.

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