APA (7th ed.) Citation

Leonard, J. W., & Cockrell, C. F. (1970). Basic methods of removing sulfur from coal. Mining Congress Journal, 56, 65.

Chicago Style (17th ed.) Citation

Leonard, J. W., and C. F. Cockrell. "Basic Methods of Removing Sulfur from Coal." Mining Congress Journal 56 (1970): 65.

MLA (9th ed.) Citation

Leonard, J. W., and C. F. Cockrell. "Basic Methods of Removing Sulfur from Coal." Mining Congress Journal, vol. 56, 1970, p. 65.