Gaya APA

Tuchman, B, W. (1980). The proud tower: A portrait of the world before the war 1890-1914. . New York: New York Bantam Books.

Gaya MLA

Tuchman, Barbara, W.. "The proud tower: A portrait of the world before the war 1890-1914. ". New York: New York Bantam Books, 1980. Buku.