APA (7th ed.) Citation

Roberts. (1954). Black popes: Authority: its Use and abuse. Longmans, Green and Co.

Chicago Style (17th ed.) Citation

Roberts. Black Popes: Authority: Its Use and Abuse. London: Longmans, Green and Co, 1954.

MLA (9th ed.) Citation

Roberts. Black Popes: Authority: Its Use and Abuse. Longmans, Green and Co, 1954.

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