Gaya APA

Foster, N, H. (1992). Oil is first found in the mind the philosophy of exploration . Tulsa,Oklahoma: The american assciation of petroleum Geologis All right reserved.

Gaya MLA

Foster, Norman, H.. "Oil is first found in the mind the philosophy of exploration". Tulsa,Oklahoma: The american assciation of petroleum Geologis All right reserved, 1992. Text.