APA (7th ed.) Citation

Brobst, D. A., & Pratt, W. P. (1973). United States mineral resources. U.S. Govt. Print. Off.

Chicago Style (17th ed.) Citation

Brobst, Donald Albert, and Walden P. Pratt. United States Mineral Resources. Washington: U.S. Govt. Print. Off, 1973.

MLA (9th ed.) Citation

Brobst, Donald Albert, and Walden P. Pratt. United States Mineral Resources. U.S. Govt. Print. Off, 1973.

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