Sách tham khảo Thuyết_duy_linh

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WikiPedia: Thuyết_duy_linh http://connection.ebscohost.com/c/articles/8635968... http://connection.ebscohost.com/c/articles/8637219... http://www.skepticreport.com/sr/?p=579 http://www.tandfonline.com/doi/pdf/10.1080/0048721... http://www.foxsisters.net/ http://backstoryradio.org/american-spirit-a-histor... http://www.csicop.org/sb/show/investigating_spirit... http://www.dmoz.org/Society/Religion_and_Spiritual... http://www.psupress.org/books/titles/978-0-271-071... //www.worldcat.org/issn/2168-8621