APA-referens (7:e uppl.)

Hoover, H. (1909). Principles of mining: Valuation, organization and administration : copper, gold, lead, silver, tin and zinc (First ed.). McGraw-Hill ; Hill Publishing Co..

Chicago-referens (17:e uppl.)

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.

MLA-referens (8:e uppl.)

Hoover, Herbert. Principles of Mining: Valuation, Organization and Administration : Copper, Gold, Lead, Silver, Tin and Zinc. First ed. McGraw-Hill ; Hill Publishing Co., 1909.