Dyfyniad APA

Butterfield, H. (1981). The origins of history (First edition.). Basic Book Inc. Publisher.

Dyfyniad Arddull Chicago

Butterfield, Herbert. The Origins of History. First edition. New York: Basic Book Inc. Publisher, 1981.

Dyfyniad MLA

Butterfield, Herbert. The Origins of History. First edition. Basic Book Inc. Publisher, 1981.

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