APA (7th ed.) Citation

United States. Bureau of Mines. (1937). Report of Investigations: Permissible electrically operated hand--held coal drills. [s.n.].

Chicago Style (17th ed.) Citation

United States. Bureau of Mines. Report of Investigations: Permissible Electrically Operated Hand--held Coal Drills. [Washington]: [s.n.], 1937.

MLA (9th ed.) Citation

United States. Bureau of Mines. Report of Investigations: Permissible Electrically Operated Hand--held Coal Drills. [s.n.], 1937.

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