Radhakrishnan, S. (1953). The principal upanisads: By S. Radhakrishnan. : Unwin brothers.
Chicago-Zitierstil (17. Ausg.)Radhakrishnan, Sarvepalli. The Principal Upanisads: By S. Radhakrishnan. London: : Unwin brothers, 1953.
MLA-Zitierstil (8. Ausg.)Radhakrishnan, Sarvepalli. The Principal Upanisads: By S. Radhakrishnan. : Unwin brothers, 1953.
警告：這些引文格式不一定是100％准確.