APA (7th ed.) Citation

Smith, S. F. (1907). The Encyclical on "Modernism". London.

Chicago Style (17th ed.) Citation

Smith, Sydney F. The Encyclical on "Modernism". London, 1907.

MLA (8th ed.) Citation

Smith, Sydney F. The Encyclical on "Modernism". London, 1907.

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