Duncan, H. (1972). Heart to heart talks with Jehovah's witnesses. Missionary Cruseder.
Cita Chicago Style (17a ed.)Duncan, Homer. Heart to Heart Talks with Jehovah's Witnesses. Missionary Cruseder, 1972.
Cita MLA (9a ed.)Duncan, Homer. Heart to Heart Talks with Jehovah's Witnesses. Missionary Cruseder, 1972.
Precaución: Estas citas no son 100% exactas.