Παραπομπή APA

Deshpande , B. .. G. (1992). The world of petroleum. Wiley eastern Ltd.

Παραπομπή Chicago Style

Deshpande , B . G. The World of Petroleum. New Dehlhi: Wiley eastern Ltd, 1992.

Παραπομπή MLA

Deshpande , B . G. The World of Petroleum. Wiley eastern Ltd, 1992.