APA (7th ed.) Citation

United States. Bureau of Mines. (1938). Federal placer-­mining laws and regulations; Small-scale placer-mining methods. [s.n.].

Chicago Style (17th ed.) Citation

United States. Bureau of Mines. Federal Placer-­mining Laws and Regulations; Small-scale Placer-mining Methods. [Washington]: [s.n.], 1938.

MLA (9th ed.) Citation

United States. Bureau of Mines. Federal Placer-­mining Laws and Regulations; Small-scale Placer-mining Methods. [s.n.], 1938.

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