Dyfyniad APA

Yewdale, M. S. (1939). The origin of the human race. Priv. print. [American book-Stratford press, inc.].

Dyfyniad Arddull Chicago

Yewdale, Merton Stark. The Origin of the Human Race. [New York]: Priv. print. [American book-Stratford press, inc.], 1939.

Dyfyniad MLA

Yewdale, Merton Stark. The Origin of the Human Race. Priv. print. [American book-Stratford press, inc.], 1939.

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