APA (7th ed.) Citation

Leonard, J. W. (1968). Coal preparation. The american institute of mining, metallurgical, and petroleum engineers.

Chicago Style (17th ed.) Citation

Leonard, Joseph W. Coal Preparation. New York: The american institute of mining, metallurgical, and petroleum engineers, 1968.

MLA (9th ed.) Citation

Leonard, Joseph W. Coal Preparation. The american institute of mining, metallurgical, and petroleum engineers, 1968.