APA (7th ed.) Citation

Langer, W. L. (1977). The Franco-Russian alliance, 1890-1894. Octagon Books.

Chicago Style (17th ed.) Citation

Langer, William L. The Franco-Russian Alliance, 1890-1894. New York: Octagon Books, 1977.

MLA (9th ed.) Citation

Langer, William L. The Franco-Russian Alliance, 1890-1894. Octagon Books, 1977.

Warning: These citations may not always be 100% accurate.