APA (7th ed.) Citation

Dobbin, C. E. (1931). Analyses of Wyoming coals. U.S. Government Printing Office.

Chicago Style (17th ed.) Citation

Dobbin, C. E. Analyses of Wyoming Coals. [Washington?]: U.S. Government Printing Office, 1931.

MLA (9th ed.) Citation

Dobbin, C. E. Analyses of Wyoming Coals. U.S. Government Printing Office, 1931.