Cita APA (7a ed.)

Riley-Smith, L., & Riley-Smith, J. S. C. (1981). The crusades: Idea and reality, 1095-1274. Edward Arnold.

Cita Chicago Style (17a ed.)

Riley-Smith, Louise, y Jonathan Simon Christopher Riley-Smith. The Crusades: Idea and Reality, 1095-1274. London: Edward Arnold, 1981.

Cita MLA (9a ed.)

Riley-Smith, Louise, y Jonathan Simon Christopher Riley-Smith. The Crusades: Idea and Reality, 1095-1274. Edward Arnold, 1981.