Sivananda,Swami. (1998). Principles Upanishads (NA.). Divine Life Society.
芝加哥风格引文Sivananda,Swami. Principles Upanishads. NA. Himalayas: Divine Life Society, 1998.
MLA引文Sivananda,Swami. Principles Upanishads. NA. Divine Life Society, 1998.
警告：这些引文格式不一定是100％准确.