Sivananda,Swami. (1998). Principles Upanishads (NA.). Divine Life Society.
Chicago Style (17th ed.) CitationSivananda,Swami. Principles Upanishads. NA. Himalayas: Divine Life Society, 1998.
MLA (9th ed.) CitationSivananda,Swami. Principles Upanishads. NA. Divine Life Society, 1998.
Warning: These citations may not always be 100% accurate.