Jehovah's Witnesses
- 1. The Getty Art & Architecture Thesaurus. 300265857. The J. Paul Getty Trust, 2000.
- 2. M. James Penton. Apocalypse Delayed: The Story of Jehovah's Witnesses, Third Edition. University of Toronto Press, Scholarly Publishing Division, 2015.
- 3. Melton, John Gordon. Jehovah’s Witness. Encyclopaedia Britannica Online.