APA (7th ed.) Citation

Mathews, E. B., & Rutledge, J. J. (1930). Analyses of Maryland coals. U.S. Government Printing Office.

Chicago Style (17th ed.) Citation

Mathews, Edward Bennett, and J. J. Rutledge. Analyses of Maryland Coals. [Washington?]: U.S. Government Printing Office, 1930.

MLA (9th ed.) Citation

Mathews, Edward Bennett, and J. J. Rutledge. Analyses of Maryland Coals. U.S. Government Printing Office, 1930.