Cita APA (7a ed.)

Runciman, S. (1957). A history of the Crusades. University Press.

Cita Chicago Style (17a ed.)

Runciman, Steven. A History of the Crusades. Cambridge: University Press, 1957.

Cita MLA (9a ed.)

Runciman, Steven. A History of the Crusades. University Press, 1957.