APA (7th ed.) Citation

Towle, S. W. (1993). World copper smelter sulfur balance-1988. U.S. Dept. of the Interior, Bureau of Mines.

Chicago Style (17th ed.) Citation

Towle, Stewart W. World Copper Smelter Sulfur Balance-1988. Washington, D.C.: U.S. Dept. of the Interior, Bureau of Mines, 1993.

MLA (9th ed.) Citation

Towle, Stewart W. World Copper Smelter Sulfur Balance-1988. U.S. Dept. of the Interior, Bureau of Mines, 1993.