APA (7th ed.) Citation

Hoover, H. (2008). Principles of Mining: Valuation, Organization and Administration. Project Gutenberg.

Chicago Style (17th ed.) Citation

Hoover, Herbert. Principles of Mining: Valuation, Organization and Administration. Project Gutenberg, 2008.

MLA (9th ed.) Citation

Hoover, Herbert. Principles of Mining: Valuation, Organization and Administration. Project Gutenberg, 2008.

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