Dyfyniad APA

(1928). Whither mankind: A panorama of modern civilization. New York: Longmans, Green and Co.

Dyfyniad Arddull Chicago

Whither Mankind: A Panorama of Modern Civilization. New York: Longmans, Green and Co, 1928.

Dyfyniad MLA

Whither Mankind: A Panorama of Modern Civilization. New York: Longmans, Green and Co, 1928.

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