Gruss, E. C. (2003). The four presidents of the Watch Tower Society (Jehovah's Witnesses): The men and the organization they created. Xulon Press.
Chicago-Zitierstil (17. Ausg.)Gruss, Edmond C. The Four Presidents of the Watch Tower Society (Jehovah's Witnesses): The Men and the Organization They Created. s. l: Xulon Press, 2003.
MLA-Zitierstil (9. Ausg.)Gruss, Edmond C. The Four Presidents of the Watch Tower Society (Jehovah's Witnesses): The Men and the Organization They Created. Xulon Press, 2003.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.