Dyfyniad APA

Colton, J. (1980). Twentieth century. Time-Life Books.

Dyfyniad Arddull Chicago

Colton, Joel. Twentieth Century. Alexandria, Va: Time-Life Books, 1980.

Dyfyniad MLA

Colton, Joel. Twentieth Century. Time-Life Books, 1980.

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