^Carlos S. Alvarado, "Rufus Osgood Mason (1830–1903) and the Popularization of Psychical Research in America", (Parapsychology Foundation), abstract from "Forgotten Pioneers of Parapsychology", 50th Annual Convention of the Parapsychological Association, Psypioneer Newsletter, Volume 3, No. 9; September 2007 (online) [وصلة مكسورة]نسخة محفوظة 2016-12-23 في Wayback Machine
^Rossiter Johnson & John Howard Brown, The Twentieth Century Biographical Dictionary of Notable Americans, The Biographical Society, 1904.
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