The Nigerian petroleum industry :
a guide /
compiled by Beverly Ann Gray, African Section, African and Middle Eastern Division.
APA Citation
Gray, B. Ann., Library of Congress. African Section. (1978). The Nigerian petroleum industry: a guide. Washington: Library of Congress.
MLA Citation
Gray, Beverly Ann, and Library of Congress. African Section. The Nigerian Petroleum Industry: a Guide. Washington: Library of Congress, 1978.
Warning: These citations may not always be complete (especially for serials).