Dyfyniad APA

Volpe & E. Peter. (1993). Biology and Human Concerns (4th ed.). Wm. C. Brown Publishers.

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

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