APA (7th ed.) Citation

United States. Bureau of Mines. (1920). Treating natural-gas gasoline to meet "doctor test". [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Bureau of Mines. Treating Natural-gas Gasoline to Meet "Doctor Test". [Washington]: [publisher not identified], 1920.

MLA (9th ed.) Citation

United States. Bureau of Mines. Treating Natural-gas Gasoline to Meet "Doctor Test". [publisher not identified], 1920.

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