Style de citation APA (7e éd.)

Bull, M. G., Riley-Smith, J. S. C., & Housley, N. (2003). Western approaches. The experience of crusading.

Style de citation Chicago (17e éd.)

Bull, Marcus Graham, Jonathan Simon Christopher Riley-Smith, et Norman Housley. "Western Approaches." The Experience of Crusading 2003.

Style de citation MLA (8e éd.)

Bull, Marcus Graham, et al. "Western Approaches." The Experience of Crusading, 2003.