Jagat Singh. (1977). The science of the soul: Consisting of discourses and excerpts from letters (5th ed.). Radha Soami Satsang Beas.
Lua i Stíl Chicago (17ú heag.)Jagat Singh. The Science of the Soul: Consisting of Discourses and Excerpts from Letters. 5th ed. Beas: Radha Soami Satsang Beas, 1977.
Lua MLA (8ú heag.)Jagat Singh. The Science of the Soul: Consisting of Discourses and Excerpts from Letters. 5th ed. Radha Soami Satsang Beas, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.