Rajagopalachari, C. (2021). Upanishad. Bharathiyavidya Bhavan.
Chicago-čujuhus (17. p.)Rajagopalachari, C. Upanishad. Mumbai: Bharathiyavidya Bhavan, 2021.
MLA-čujuhus (9. p.)Rajagopalachari, C. Upanishad. Bharathiyavidya Bhavan, 2021.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.