Dyfyniad APA
Wallace, B., & Simmons, G. M. (1987). Biology for living. Johns Hopkins University Press.
Dyfyniad Arddull Chicago
Wallace, Bruce, and George M. Simmons. Biology for Living. Baltimore: Johns Hopkins University Press, 1987.
Dyfyniad MLA
Wallace, Bruce, and George M. Simmons. Biology for Living. Johns Hopkins University Press, 1987.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.