Citazione Stile APA (7a Edizione)

Gilbert, M. (1997). A history of the twentieth century. W. Morrow.

Citazione stile Chigago Style (17a edizione)

Gilbert, Martin. A History of the Twentieth Century. New York: W. Morrow, 1997.

Citatione MLA (9a ed.)

Gilbert, Martin. A History of the Twentieth Century. W. Morrow, 1997.