Dyfyniad APA

Sheinfeld, A. (1973). Your heredity and enviornment. Chatto and Windus.

Dyfyniad Arddull Chicago

Sheinfeld, Amram. Your Heredity and Enviornment. London: Chatto and Windus, 1973.

Dyfyniad MLA

Sheinfeld, Amram. Your Heredity and Enviornment. Chatto and Windus, 1973.

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