APA (7th ed.) Citation

United States. Bureau of Mines. (1937). Design of small wooden head frames [for mine shafts]. [s.n.].

Chicago Style (17th ed.) Citation

United States. Bureau of Mines. Design of Small Wooden Head Frames [for Mine Shafts]. [Washington]: [s.n.], 1937.

MLA (9th ed.) Citation

United States. Bureau of Mines. Design of Small Wooden Head Frames [for Mine Shafts]. [s.n.], 1937.

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