Gaya APA

Oil, W., Co., A, G, P. (1987). Composite catalog : of oil field equipment & services (1986 87). Volume 2 (1987). : Texas : Gulf Pub. Co.,.

Gaya MLA

Oil, World., Co., A, Gulf, Publ.. "Composite catalog : of oil field equipment & services (1986 87). Volume 2". 1987 : Texas : Gulf Pub. Co.,, 1987. Text.