United States. Department of Agriculture. Office of Operations. (1993). Directory of service stations that sell ethanol-blended gasoline. U.S. Dept. of Agriculture, Office of Operations.
Chicago Style (17th ed.) CitationUnited States. Department of Agriculture. Office of Operations. Directory of Service Stations That Sell Ethanol-blended Gasoline. [Washington, D.C.?]: U.S. Dept. of Agriculture, Office of Operations, 1993.
MLA (9th ed.) CitationUnited States. Department of Agriculture. Office of Operations. Directory of Service Stations That Sell Ethanol-blended Gasoline. U.S. Dept. of Agriculture, Office of Operations, 1993.
Warning: These citations may not always be 100% accurate.