APA সাইটেশন

Kalra,G D. (1983). Mineral development in Bihar 1979-80 to 1988-89. NCAER.

শিকাগো স্টাইলে সাইটেশন

Kalra,G D. Mineral Development in Bihar 1979-80 to 1988-89. New Delhi: NCAER, 1983.

এমএলএ সাইটেশন

Kalra,G D. Mineral Development in Bihar 1979-80 to 1988-89. NCAER, 1983.