Divine Life SocietyDivine enterprise: Gurus and the Hindu Nationalist Movement, by Lise McKean. University of Chicago Press, 1996. ISBN0-226-56009-0. Page 164=165.
Swami ShivanandaReligion and anthropology: a critical introduction, by Brian Morris. Cambridge University Press, 2006. ISBN0-521-85241-2. Page 144.