Cita APA (7th ed.)

Tuchmann, B. W. (1966). The proud tower: A portrait of the world before the war 1890-1914. Macmillan Company.

Cita Chicago (17th ed.)

Tuchmann, Bárbara W. The Proud Tower: A Portrait of the World Before the War 1890-1914. Nueva York: Macmillan Company, 1966.

Cita MLA (9th ed.)

Tuchmann, Bárbara W. The Proud Tower: A Portrait of the World Before the War 1890-1914. Macmillan Company, 1966.