^Baldick, Julian (2000) Mystical Islam: an introduction to Sufism Tauris Parke Paperbacks, London, p. 66, ISBN1-86064-631-X
^Schimmel, Annemarie (1980) Islam in the Indian subcontinent E.J. Brill, Leiden, page 34, ISBN90-04-06117-7
Sources
Ewing, Katherine Pratt (1997). Arguing Sainthood: Modernity, Psychoanalysis, and Islam. Durham, North Carolina: Duke University Press. ISBN0-8223-2026-6.