Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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