Dyfyniad APA

Curtis, H., & Barnes, N. S. (1994). Invitation to Biology (5th.ed.). Worth.

Dyfyniad Arddull Chicago

Curtis, Helena, and N. Sue Barnes. Invitation to Biology. 5th.ed. New York: Worth, 1994.

Dyfyniad MLA

Curtis, Helena, and N. Sue Barnes. Invitation to Biology. 5th.ed. Worth, 1994.

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