Dyfyniad APA

Simon, H. (1962). The study of birds made simple. Doubleday.

Dyfyniad Arddull Chicago

Simon, Hilda. The Study of Birds Made Simple. Garden City, N. Y: Doubleday, 1962.

Dyfyniad MLA

Simon, Hilda. The Study of Birds Made Simple. Doubleday, 1962.

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