Dyfyniad APA

Brocklehurts, K. (1984). Biology now. London: Hodder and Stoughton.

Dyfyniad Arddull Chicago

Brocklehurts, Keith. Biology Now. London: Hodder and Stoughton, 1984.

Dyfyniad MLA

Brocklehurts, Keith. Biology Now. London: Hodder and Stoughton, 1984.

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