APA (7th ed.) Citation

Gardner, R. D. (1930). Mining practice at Harmony Mines Company, Baker, Idaho. [publisher not identified].

Chicago Style (17th ed.) Citation

Gardner, R. Duncan. Mining Practice at Harmony Mines Company, Baker, Idaho. Washington, D.C.: [publisher not identified], 1930.

MLA (9th ed.) Citation

Gardner, R. Duncan. Mining Practice at Harmony Mines Company, Baker, Idaho. [publisher not identified], 1930.