APA (7th ed.) Citation

Smith, H. M. (1928). Study of less volatile oils in Salt Creek (Wyo.) crude. U.S. Government Printing Office.

Chicago Style (17th ed.) Citation

Smith, Harold M. Study of Less Volatile Oils in Salt Creek (Wyo.) Crude. [Washington?]: U.S. Government Printing Office, 1928.

MLA (9th ed.) Citation

Smith, Harold M. Study of Less Volatile Oils in Salt Creek (Wyo.) Crude. U.S. Government Printing Office, 1928.