Dyfyniad APA

Sherman, I. W., & Sherman, V. G. (1979). Biology: A Human Approach. New York: Oxford University.

Dyfyniad Arddull Chicago

Sherman, Irwin W., và Villa G. Sherman. Biology: A Human Approach. New York: Oxford University, 1979.

Dyfyniad MLA

Sherman, Irwin W., và Villa G. Sherman. Biology: A Human Approach. New York: Oxford University, 1979.

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