Dyfyniad APA

Volpe, E. P. (1993). Biology and human concerns (4th ed.). Wm. C. Brown.

Dyfyniad Arddull Chicago

Volpe, E. Peter. Biology and Human Concerns. 4th ed. Dubuque: Wm. C. Brown, 1993.

Dyfyniad MLA

Volpe, E. Peter. Biology and Human Concerns. 4th ed. Wm. C. Brown, 1993.

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