Cita APA (7a ed.)

Runciman, S. (1964). A history of the Crusades. Harper.

Cita Chicago Style (17a ed.)

Runciman, Steven. A History of the Crusades. New York: Harper, 1964.

Cita MLA (8a ed.)

Runciman, Steven. A History of the Crusades. Harper, 1964.