APA citiranje

Sontag, R. J. (1933). European diplomatic history 1871 - 1932. New York: The Century.

Trích dẫn kiểu Chicago

Sontag, Raymond James. European Diplomatic History 1871 - 1932. New York: The Century, 1933.

MLA citiranje

Sontag, Raymond James. European Diplomatic History 1871 - 1932. New York: The Century, 1933.