APA (7th ed.) Citation

Spencer, F. D. (1953). Coal resources of Indiana. United States Department of the Interior, Geological Survey.

Chicago Style (17th ed.) Citation

Spencer, Frank Darwyn. Coal Resources of Indiana. Washington, D.C.: United States Department of the Interior, Geological Survey, 1953.

MLA (9th ed.) Citation

Spencer, Frank Darwyn. Coal Resources of Indiana. United States Department of the Interior, Geological Survey, 1953.

Warning: These citations may not always be 100% accurate.