Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (8a ed.)

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