APA (7th ed.) Citation

Sontag, R. J. (1933). European diplomatic history 1871-1932. Appleton-Century.

Chicago Style (17th ed.) Citation

Sontag, Raymond James. European Diplomatic History 1871-1932. New York [u.a.]: Appleton-Century, 1933.

MLA (8th ed.) Citation

Sontag, Raymond James. European Diplomatic History 1871-1932. Appleton-Century, 1933.