Dyfyniad APA

West, W. M., & West, R. (1936). The story of modern progress with a preliminary survey of eariler progress (New ed.). Allyn and Bacon.

Dyfyniad Arddull Chicago

West, Willis Mason, and Ruth West. The Story of Modern Progress with a Preliminary Survey of Eariler Progress. New ed. Boston ; New York [etc.]: Allyn and Bacon, 1936.

Dyfyniad MLA

West, Willis Mason, and Ruth West. The Story of Modern Progress with a Preliminary Survey of Eariler Progress. New ed. Allyn and Bacon, 1936.

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