Gaya APA
Oil, W. (1987).
Composite catalog of oil field equipment and services. 1986 1987, Vol.1 (1987).
:
Houston : World Oil.,.
Gaya MLA
Oil, World.
"Composite catalog of oil field equipment and services. 1986 1987, Vol.1".
1987
:
Houston : World Oil.,,
1987.
Text.