APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (8:e uppl.)

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