Dyfyniad APA
Zehavi, A., & Zahavi, A. (1997). The handicap principle: A missing piece of Darwin's puzzle. Oxford University Press.
Dyfyniad Arddull Chicago
Zehavi, Amots, and Avishag Zahavi. The Handicap Principle: A Missing Piece of Darwin's Puzzle. New York: Oxford University Press, 1997.
Dyfyniad MLA
Zehavi, Amots, and Avishag Zahavi. The Handicap Principle: A Missing Piece of Darwin's Puzzle. Oxford University Press, 1997.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.