Dyfyniad APA

Campbell, N. A., & Reece, J. B. (2009). Biology (8th ed.). Pearson Benjamin Cummings.

Dyfyniad Arddull Chicago

Campbell, Neil A., and Jane B. Reece. Biology. 8th ed. San Francisco: Pearson Benjamin Cummings, 2009.

Dyfyniad MLA

Campbell, Neil A., and Jane B. Reece. Biology. 8th ed. Pearson Benjamin Cummings, 2009.

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