APA (7th ed.) Citation

Powell, J. M. (1977). Honorius III and the leadership of the crusade.

Chicago Style (17th ed.) Citation

Powell, James Matthew. Honorius III and the Leadership of the Crusade. 1977.

MLA (9th ed.) Citation

Powell, James Matthew. Honorius III and the Leadership of the Crusade. 1977.

Warning: These citations may not always be 100% accurate.