Jagat Singh. (1977). The science of the soul: Consisting of discourses and excerpts from letters (5th ed.). Radha Soami Satsang Beas.
Chicago-referens (17:e uppl.)Jagat Singh. The Science of the Soul: Consisting of Discourses and Excerpts from Letters. 5th ed. Beas: Radha Soami Satsang Beas, 1977.
MLA-referens (8:e uppl.)Jagat Singh. The Science of the Soul: Consisting of Discourses and Excerpts from Letters. 5th ed. Radha Soami Satsang Beas, 1977.
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