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.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Briggs, 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.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Briggs, 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.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.