TUCHAN, B. W. (1965). The proud tower - A portrait of the world before the war 1890-1914 - Barbara W. Tuchman. The Macmillan Company.
Lua i Stíl Chicago (17ú heag.)TUCHAN, Barbara W. The Proud Tower - A Portrait of the World Before the War 1890-1914 - Barbara W. Tuchman. The Macmillan Company, 1965.
Lua MLA (8ú heag.)TUCHAN, Barbara W. The Proud Tower - A Portrait of the World Before the War 1890-1914 - Barbara W. Tuchman. The Macmillan Company, 1965.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.