Gaya APA

Engineers, S, O, P. (1991). Transactions of the socierty of petroleum engineers vol. 289 1990. (1991). : Richardson : Society of Petroleum Engineers,.

Gaya MLA

Engineers, Society, Of, Petroleum. "Transactions of the socierty of petroleum engineers vol. 289 1990.". 1991 : Richardson : Society of Petroleum Engineers,, 1991. Text.