Singh, L. A. (1970). Yoga psychology: Methods & approaches ([1st ed.). Devendra Singh]; sole distributors: Bharatiya Vidya Prakashan, Varanasi.
Lua i Stíl Chicago (17ú heag.)Singh, Lal Amarendra. Yoga Psychology: Methods & Approaches. [1st ed. Unnao, U.P.: Devendra Singh]; sole distributors: Bharatiya Vidya Prakashan, Varanasi, 1970.
Lua MLA (8ú heag.)Singh, Lal Amarendra. Yoga Psychology: Methods & Approaches. [1st ed. Devendra Singh]; sole distributors: Bharatiya Vidya Prakashan, Varanasi, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.