APA (7th ed.) Citation

Cameron, E. N. (1986). At the crossroads: The mineral problems of the United States. Wiley.

Chicago Style (17th ed.) Citation

Cameron, Eugene N. At the Crossroads: The Mineral Problems of the United States. New York: Wiley, 1986.

MLA (9th ed.) Citation

Cameron, Eugene N. At the Crossroads: The Mineral Problems of the United States. Wiley, 1986.