Viśvambharan, E. (1980). Nārāyaṇaguru: Jīvacaritṟaṃ. Sāhityapṟavarttaka Sahakaraṇasaṅghaṃ : Nāṣanal Bukksṯāḷ.
Dyfyniad Arddull ChicagoViśvambharan, Eṃ. Nārāyaṇaguru: Jīvacaritṟaṃ. Kōṭṭayaṃ: Sāhityapṟavarttaka Sahakaraṇasaṅghaṃ : Nāṣanal Bukksṯāḷ, 1980.
Dyfyniad MLAViśvambharan, Eṃ. Nārāyaṇaguru: Jīvacaritṟaṃ. Sāhityapṟavarttaka Sahakaraṇasaṅghaṃ : Nāṣanal Bukksṯāḷ, 1980.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.