APA (7th ed.) Citation

Allen, J. L. (2005). Opus Dei: Secrets and power inside the Catholic Church. Allen Lane.

Chicago Style (17th ed.) Citation

Allen, John L. Opus Dei: Secrets and Power Inside the Catholic Church. London [etc.]: Allen Lane, 2005.

MLA (9th ed.) Citation

Allen, John L. Opus Dei: Secrets and Power Inside the Catholic Church. Allen Lane, 2005.

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