Donald J Walters. (1998). Superconsciousness: A guide to meditation. Motilal Banarsidass.
Chicago Style aipamenaDonald J Walters. Superconsciousness: A Guide to Meditation. New Delhi: Motilal Banarsidass, 1998.
MLA aipamenaDonald J Walters. Superconsciousness: A Guide to Meditation. Motilal Banarsidass, 1998.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.