Dyfyniad APA

Douglas, W. O. (1950). Of men and mountains. New York: Happer and Brothers Publishers.

Dyfyniad Arddull Chicago

Douglas, William O. Of Men and Mountains. New York: Happer and Brothers Publishers, 1950.

Dyfyniad MLA

Douglas, William O. Of Men and Mountains. New York: Happer and Brothers Publishers, 1950.

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