Παραπομπή APA

Sinha, R., & Sharma, N. (1970). Mineral economics: A textbook for university students. Oxford and IBH Publishing Co.

Παραπομπή Chicago Style

Sinha, R.K, και N.L Sharma. Mineral Economics: A Textbook for University Students. New Delhi: Oxford and IBH Publishing Co, 1970.

Παραπομπή MLA

Sinha, R.K, και N.L Sharma. Mineral Economics: A Textbook for University Students. Oxford and IBH Publishing Co, 1970.