^Corner, Patricia (2009). “Workplace spirituality and business ethics: Insights from an Eastern spiritual tradition”. Journal of Business Ethics85 (3): 377–389. doi:10.1007/s10551-008-9776-2.
^Tiwari, Kedar Nath (1998). Classical Indian Ethical Thought. Motilal Banarsidass Publishers. p. 87. ISBN978-81-208-1607-7
^The Yoga-System of Patañjali. Harvard University Press. pp. 178–182
^“Śāṇdilya-Upanishad of Atharvaṇaveḍa”. Thirty Minor Upanishads. Madras: Kessinger Publishing. (1914). pp. 173–176. ISBN978-1164026419