APA (7th ed.) Citation

Koschmann, A. H., & Bergendahl, M. H. (1968). Principal gold-producing districts of the United States. U.S. Dept. of the Interior.

Chicago Style (17th ed.) Citation

Koschmann, A. H., and M. H. Bergendahl. Principal Gold-producing Districts of the United States. Washington: U.S. Dept. of the Interior, 1968.

MLA (9th ed.) Citation

Koschmann, A. H., and M. H. Bergendahl. Principal Gold-producing Districts of the United States. U.S. Dept. of the Interior, 1968.