Style de citation APA (7e éd.)

Riley-Smith, J. S. C. (1977). What were the crusades? Macmillan.

Style de citation Chicago (17e éd.)

Riley-Smith, Jonathan Simon Christopher. What Were the Crusades? London: Macmillan, 1977.

Style de citation MLA (8e éd.)

Riley-Smith, Jonathan Simon Christopher. What Were the Crusades? Macmillan, 1977.