United States. Energy Information Administration. Office of Oil and Gas. (1994). Petroleum marketing annual. The Office : Supt. of Docs., U.S. G.P.O. [distributor.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUnited States. Energy Information Administration. Office of Oil and Gas. Petroleum Marketing Annual. Washington, D.C.: The Office : Supt. of Docs., U.S. G.P.O. [distributor, 1994.
एमएलए (9वां संस्करण) प्रशस्ति पत्रUnited States. Energy Information Administration. Office of Oil and Gas. Petroleum Marketing Annual. The Office : Supt. of Docs., U.S. G.P.O. [distributor, 1994.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.