Prabhananda, S. (1961). The upanishads Breath of the eternal (ed.). The new American library.

Prabhananda, Swami. The Upanishads Breath of the Eternal. ed. California: The new American library, 1961.

Prabhananda, Swami. The Upanishads Breath of the Eternal. ed. The new American library, 1961.