Cita APA

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

Citación estilo Chicago

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

Cita MLA

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