otation Gūḍhārtha Dīpikā. Calcutta: Advaita Ashrama Publication Department. ISBN 81-7505-194-9.Harinanda, Swami. Yoga and The Portal. Jai Dee Marketing. ISBN 0978142950. {{cite book}}: Cite has empty unknown parameter: |coauthors= (help)Jacobsen, Knut A. (Editor) (2005). Theory And Practice of Yoga: Essays in Honour of Gerald James Larson. Brill Academic Publishers. ISBN 9004147578. {{cite book}}: |first= has generic name (help); Unknown parameter |coauthors= ignored (|author= suggested) (help) (Studies in the History of Religions, 110)Keay, John (2000). India: A History. New York: Grove Press. ISBN 0-8021-3797-0. {{cite book}}: Cite has empty unknown parameter: |coauthors= (help)Michaels, Axel (2004). Hinduism: Past and Present. Princeton, New Jersey: Princeton University Press. ISBN 0-691-08953-1. {{cite book}}: Cite has empty unknown parameter: |coauthors= (help)Mittra, Dharma Sri. Asanas: 608 Yoga Poses. 1st ed. California: New World Library 2003.Müller, Max (1899). Six Syste