Hoover, H. (1909). Principles of mining: Valuation, organization and administration : copper, gold, lead, silver, tin and zinc (First ed.). McGraw-Hill ; Hill Publishing Co..
Citace podle Chicago (17th ed.)Hoover, Herbert. Principles of Mining: Valuation, Organization and Administration : Copper, Gold, Lead, Silver, Tin and Zinc. First ed. New York : London: McGraw-Hill ; Hill Publishing Co., 1909.
Citace podle MLA (8th ed.)Hoover, Herbert. Principles of Mining: Valuation, Organization and Administration : Copper, Gold, Lead, Silver, Tin and Zinc. First ed. McGraw-Hill ; Hill Publishing Co., 1909.
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