The Upanishads.
Translated from the Sanskrit with introductions embodying a general survey and the metaphysics and phychology of the Upanishads, and with notes and explanations based on the commentary of Śri Śankarāchārya, the great ninth-century philosopher and saint of India, by Swami Nikhilananda.

APA Citation

Śaṅkarācārya., Nikhilananda, S. (195154). The Upanishads. London: Phoenix House.

MLA Citation

Śaṅkarācārya, and Swami Nikhilananda. The Upanishads. London: Phoenix House, 195154.

Warning: These citations may not always be complete (especially for serials).