Dyfyniad APA

Raven, P. H., & Johnson, G. B. (1996). Biology (4th ed.). Wm. C. Brown Publishers.

Dyfyniad Arddull Chicago

Raven, Peter H., and George B. Johnson. Biology. 4th ed. Dubuque, IA: Wm. C. Brown Publishers, 1996.

Dyfyniad MLA

Raven, Peter H., and George B. Johnson. Biology. 4th ed. Wm. C. Brown Publishers, 1996.

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