Winkowski, M. A., & Van Praagh, J. (2009). When ghosts speak: Understanding the world of earthbound spirits (1st mass market ed.). Grand Central Publishing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWinkowski, Mary Ann, और James Van Praagh. When Ghosts Speak: Understanding the World of Earthbound Spirits. 1st mass market ed. New York: Grand Central Publishing, 2009.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWinkowski, Mary Ann, और James Van Praagh. When Ghosts Speak: Understanding the World of Earthbound Spirits. 1st mass market ed. Grand Central Publishing, 2009.
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