APA-Zitierstil (7. Ausg.)

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

Chicago-Zitierstil (17. Ausg.)

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

MLA-Zitierstil (8. Ausg.)

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