APA (7th ed.) Citation
O'Reilly, B., & Leo XIII, P. (1903). Life of Leo XIII: From an authentic memoir furnished by his order : written with the encouragement, approbation and blessing of his Holiness the Pope : the complete life of the venerable father. Sampson Low.
Chicago Style (17th ed.) Citation
O'Reilly, Bernard, and Pope Leo XIII. Life of Leo XIII: From an Authentic Memoir Furnished by His Order : Written with the Encouragement, Approbation and Blessing of His Holiness the Pope : The Complete Life of the Venerable Father. London: Sampson Low, 1903.
MLA (9th ed.) Citation
O'Reilly, Bernard, and Pope Leo XIII. Life of Leo XIII: From an Authentic Memoir Furnished by His Order : Written with the Encouragement, Approbation and Blessing of His Holiness the Pope : The Complete Life of the Venerable Father. Sampson Low, 1903.
Warning: These citations may not always be 100% accurate.