APA (7th ed.) Citation

Baldwin, P. c. 2. J. (2014). Pope Gregory X and the crusades (1. publ.). Boydell Press.

Chicago Style (17th ed.) Citation

Baldwin, Philip ca. 20./21. Jh. Pope Gregory X and the Crusades. 1. publ. Woodbridge: Boydell Press, 2014.

MLA (9th ed.) Citation

Baldwin, Philip ca. 20./21. Jh. Pope Gregory X and the Crusades. 1. publ. Boydell Press, 2014.