Cita APA

Mayer, H. E., & John Gillingham. (1972). Crusades. Oxford University Press.

Chicago Edition Citation

Mayer, Hans Eberhard, i John Gillingham. Crusades. London: Oxford University Press, 1972.

Cita MLA

Mayer, Hans Eberhard, i John Gillingham. Crusades. Oxford University Press, 1972.