APA (7th ed.) Citation

Chao, E. C. T., Minkin, J. A., & Thompson, C. L. (1983). Recommended procedures and methodology of coal description. U.S. Dept. of the Interior, Geological Survey.

Chicago Style (17th ed.) Citation

Chao, E. C. T., J. A. Minkin, and C. L. Thompson. Recommended Procedures and Methodology of Coal Description. [Reston, Va.]: U.S. Dept. of the Interior, Geological Survey, 1983.

MLA (9th ed.) Citation

Chao, E. C. T., et al. Recommended Procedures and Methodology of Coal Description. U.S. Dept. of the Interior, Geological Survey, 1983.