APA (7th ed.) Citation

Riley-Smith, J. S. C. (2005). The crusades: A history (2nd ed.). Continuum.

Chicago Style (17th ed.) Citation

Riley-Smith, Jonathan Simon Christopher. The Crusades: A History. 2nd ed. London [u.a.]: Continuum, 2005.

MLA (9th ed.) Citation

Riley-Smith, Jonathan Simon Christopher. The Crusades: A History. 2nd ed. Continuum, 2005.