APA (7th ed.) Citation

Royal, R. (2000). The Catholic martyrs of the twentieth century: A comprehensive world history. Crossroad Publ.

Chicago Style (17th ed.) Citation

Royal, Robert. The Catholic Martyrs of the Twentieth Century: A Comprehensive World History. New York, NY: Crossroad Publ, 2000.

MLA (8th ed.) Citation

Royal, Robert. The Catholic Martyrs of the Twentieth Century: A Comprehensive World History. Crossroad Publ, 2000.

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