Cita APA (7th ed.)

Runciman, S. (1965). A history of the Crusades. Penguin.

Cita Chicago (17th ed.)

Runciman, Steven. A History of the Crusades. Harmondsworth: Penguin, 1965.

Cita MLA (8th ed.)

Runciman, Steven. A History of the Crusades. Penguin, 1965.