Παραπομπή APA

Sri Aurobindo. (1971). Letters on yoga. Sri Aurobindo Ashramam.

Παραπομπή Chicago Style

Sri Aurobindo. Letters on Yoga. Pondicherry: Sri Aurobindo Ashramam, 1971.

Παραπομπή MLA

Sri Aurobindo. Letters on Yoga. Sri Aurobindo Ashramam, 1971.