Dyfyniad APA

Stephens, G. C., & Best North, B. (1974). Biology. John Wiley and Sons.

Dyfyniad Arddull Chicago

Stephens, Grover C., and Barbara Best North. Biology. NewYork: John Wiley and Sons, 1974.

Dyfyniad MLA

Stephens, Grover C., and Barbara Best North. Biology. John Wiley and Sons, 1974.

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