Dyfyniad APA

Ball, G. W. (1982). The past has another pattern. New York: Norton and Company.

Dyfyniad Arddull Chicago

Ball, George W. The Past Has Another Pattern. New York: Norton and Company, 1982.

Dyfyniad MLA

Ball, George W. The Past Has Another Pattern. New York: Norton and Company, 1982.

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