Balbir Singh. (1983). The philosophy of Upanishads. Arnold-Heinemann.
Chicago Style aipamenaBalbir Singh. The Philosophy of Upanishads. New Delhi: Arnold-Heinemann, 1983.
MLA aipamenaBalbir Singh. The Philosophy of Upanishads. Arnold-Heinemann, 1983.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.