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Who's who in New York (city and state) (1904) s. 738 [2]
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Jeffrey S.J.S.LevinJeffrey S.J.S., Preston L.P.L.SchillerPreston L.P.L., Is there a religious factor in health?, „Journal of Religion and Health”, 26 (1), 1987, s. 9–36, DOI: 10.1007/BF01533291, ISSN0022-4197(ang.).
Jeffrey S.J.S.LevinJeffrey S.J.S., Preston L.P.L.SchillerPreston L.P.L., Is there a religious factor in health?, „Journal of Religion and Health”, 26 (1), 1987, s. 9–36, DOI: 10.1007/BF01533291, ISSN0022-4197(ang.).