APA (7th ed.) Citation

Runciman, S. (1951). A history of the crusades. Univ. Press.

Chicago Style (17th ed.) Citation

Runciman, Steven. A History of the Crusades. Cambridge: Univ. Press, 1951.

MLA (9th ed.) Citation

Runciman, Steven. A History of the Crusades. Univ. Press, 1951.

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