APA (7th ed.) Citation

Gardner, E. D., & Johnson, C. H. (1934). Placer mining in the western United States. Dept. of the Interior, U.S. Bureau of Mines.

Chicago Style (17th ed.) Citation

Gardner, E. D., and Charles H. Johnson. Placer Mining in the Western United States. [Washington]: Dept. of the Interior, U.S. Bureau of Mines, 1934.

MLA (8th ed.) Citation

Gardner, E. D., and Charles H. Johnson. Placer Mining in the Western United States. Dept. of the Interior, U.S. Bureau of Mines, 1934.

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