APA (7th ed.) Citation

Steffa, D. (1932). Gold mining and milling methods and costs at Vallecito Western drift mine, Angels Camp, Calif. [publisher not identified].

Chicago Style (17th ed.) Citation

Steffa, Don. Gold Mining and Milling Methods and Costs at Vallecito Western Drift Mine, Angels Camp, Calif. Washington, D.C.: [publisher not identified], 1932.

MLA (9th ed.) Citation

Steffa, Don. Gold Mining and Milling Methods and Costs at Vallecito Western Drift Mine, Angels Camp, Calif. [publisher not identified], 1932.