Dyfyniad APA

Campbell, N. A. (2008). Biology (International ed., Eight edition.). Pearson/Benjamin Cummings.

Dyfyniad Arddull Chicago

Campbell, Neil A. Biology. International ed., Eight edition. San Francisco ; London: Pearson/Benjamin Cummings, 2008.

Dyfyniad MLA

Campbell, Neil A. Biology. International ed., Eight edition. Pearson/Benjamin Cummings, 2008.

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