Gaya APA

Engineers, S, O, P. (990.). Transactions of the socierty of petroleum engineers vol. 287 1989. (1990). : Richardson : Society of Petroleum Engineers, 1.

Gaya MLA

Engineers, Society, Of, Petroleum. "Transactions of the socierty of petroleum engineers vol. 287 1989.". 1990 : Richardson : Society of Petroleum Engineers, 1, 990.. Text.