APA (7th ed.) Citation

White, G. (1867). His Holiness Pope Pius IX. London.

Chicago Style (17th ed.) Citation

White, George. His Holiness Pope Pius IX. London, 1867.

MLA (8th ed.) Citation

White, George. His Holiness Pope Pius IX. London, 1867.

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