Sivananda. (1994). Tantra yoga, nada yoga and kriya yoga. The Divine Life Society.
Chicago Edition CitationSivananda. Tantra Yoga, Nada Yoga and Kriya Yoga. Shivanandanagar: The Divine Life Society, 1994.
MLA Edition CitationSivananda. Tantra Yoga, Nada Yoga and Kriya Yoga. The Divine Life Society, 1994.
Warning: These citations may not always be 100% accurate.