APA (7th ed.) Citation

United States. Bureau of Mines. (1921). Notes on oil-shale industry with particular reference to Rocky Mountain district. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Bureau of Mines. Notes on Oil-shale Industry with Particular Reference to Rocky Mountain District. [Washington]: [publisher not identified], 1921.

MLA (9th ed.) Citation

United States. Bureau of Mines. Notes on Oil-shale Industry with Particular Reference to Rocky Mountain District. [publisher not identified], 1921.