Gruss, E. C. (1994). The ouija board: A doorway to the occult (ed.). P & R publishers.
Cita Chicago Style (17a ed.)Gruss, Edmond C. The Ouija Board: A Doorway to the Occult. ed. New Jersey: P & R publishers, 1994.
Cita MLA (9a ed.)Gruss, Edmond C. The Ouija Board: A Doorway to the Occult. ed. P & R publishers, 1994.
Precaución: Estas citas no son 100% exactas.