APA (7th ed.) Citation

Pirie-Gordon, C. H. C. (1907). Innocent the Great: An essay on his life and times. Longmans, Green.

Chicago Style (17th ed.) Citation

Pirie-Gordon, Charles H. C. Innocent the Great: An Essay on His Life and Times. London [u.a.]: Longmans, Green, 1907.

MLA (9th ed.) Citation

Pirie-Gordon, Charles H. C. Innocent the Great: An Essay on His Life and Times. Longmans, Green, 1907.