Library of Congress. Congressional Research Service & ProQuest (Firm). (1986). Northwest European Region Petroleum (Including the North Sea). [publisher not identified].
Chicago Style (17th ed.) CitationLibrary of Congress. Congressional Research Service and ProQuest (Firm). Northwest European Region Petroleum (Including the North Sea). [Place of publication not identified]: [publisher not identified], 1986.
MLA (9th ed.) CitationLibrary of Congress. Congressional Research Service and ProQuest (Firm). Northwest European Region Petroleum (Including the North Sea). [publisher not identified], 1986.
Warning: These citations may not always be 100% accurate.