Briggs, C. V. (2010). Encyclopedia of the unseen world: The ultimate guide to apparitions, death bed visions, mediums, shadow people, wandering spirits, and much, much more (1. publ.). Weiser.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBriggs, Constance Victoria. Encyclopedia of the Unseen World: The Ultimate Guide to Apparitions, Death Bed Visions, Mediums, Shadow People, Wandering Spirits, and Much, Much More. 1. publ. San Francisco, Cal.: Weiser, 2010.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBriggs, Constance Victoria. Encyclopedia of the Unseen World: The Ultimate Guide to Apparitions, Death Bed Visions, Mediums, Shadow People, Wandering Spirits, and Much, Much More. 1. publ. Weiser, 2010.
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