APA-referens (7:e uppl.)

Narayanan, P. I. A., & Subrahmanyan, N. N. (1959). Beneficiation of low grade manganese ores of India. Council of Scientific & Industrial Research.

Chicago-referens (17:e uppl.)

Narayanan, P. I. A., och N. N. Subrahmanyan. Beneficiation of Low Grade Manganese Ores of India. New Delhi: Council of Scientific & Industrial Research, 1959.

MLA-referens (8:e uppl.)

Narayanan, P. I. A., och N. N. Subrahmanyan. Beneficiation of Low Grade Manganese Ores of India. Council of Scientific & Industrial Research, 1959.