Cita APA (7a ed.)

World Oil. (1998). Composite catalog of oil field equipment & services. (43rd.ed.). Gulf Publishing Company.

Cita Chicago Style (17a ed.)

World Oil. Composite Catalog of Oil Field Equipment & Services. 43rd.ed. Texas: Gulf Publishing Company, 1998.

Cita MLA (8a ed.)

World Oil. Composite Catalog of Oil Field Equipment & Services. 43rd.ed. Gulf Publishing Company, 1998.