APA (7th ed.) Citation

Winters, H. J. (1981). Financial outlook for western United States porphyry copper mines. Mining Engineering, 33, 1243.

Chicago Style (17th ed.) Citation

Winters, H. J. "Financial Outlook for Western United States Porphyry Copper Mines." Mining Engineering 33 (1981): 1243.

MLA (9th ed.) Citation

Winters, H. J. "Financial Outlook for Western United States Porphyry Copper Mines." Mining Engineering, vol. 33, 1981, p. 1243.