Citazione Stile APA (7a Edizione)

Barnes, H. E., & David, H. (1935). The history of western civilization. Harcourt.

Citazione stile Chigago Style (17a edizione)

Barnes, Harry Elmer, e Henry David. The History of Western Civilization. New York: Harcourt, 1935.

Citatione MLA (9a ed.)

Barnes, Harry Elmer, e Henry David. The History of Western Civilization. Harcourt, 1935.