Sanu M K & Madhavan Ayyappath. (1998). Narayana Guru: A biography. Bharatiya Vidya Bhavan.
Chicago Style aipamenaSanu M K and Madhavan Ayyappath. Narayana Guru: A Biography. Bombay: Bharatiya Vidya Bhavan, 1998.
MLA aipamenaSanu M K and Madhavan Ayyappath. Narayana Guru: A Biography. Bharatiya Vidya Bhavan, 1998.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.