United States. International Trade Administration & United States. Office of the Assistant Secretary for Fossil Energy. (1985). Coal technology reference guide. U.S. Dept. of Commerce, International Trade Administration : U.S. Dept. of Energy, Fossil Energy.
Chicago Style (17th ed.) CitationUnited States. International Trade Administration and United States. Office of the Assistant Secretary for Fossil Energy. Coal Technology Reference Guide. Washington, D.C: U.S. Dept. of Commerce, International Trade Administration : U.S. Dept. of Energy, Fossil Energy, 1985.
MLA (9th ed.) CitationUnited States. International Trade Administration and United States. Office of the Assistant Secretary for Fossil Energy. Coal Technology Reference Guide. U.S. Dept. of Commerce, International Trade Administration : U.S. Dept. of Energy, Fossil Energy, 1985.