APA-viite

Allen, J. L. (2005). Opus dei: An objective look behind the myths and reality of the most controversial force in the catholic church. Penguin.

Chicago-tyylinen lähdeviittaus

Allen, John L. Opus Dei: An Objective Look Behind the Myths and Reality of the Most Controversial Force in the Catholic Church. England: Penguin, 2005.

MLA-viite

Allen, John L. Opus Dei: An Objective Look Behind the Myths and Reality of the Most Controversial Force in the Catholic Church. Penguin, 2005.