Kesler, S. E. (1994). Mineral resources of economics and the environment. Macmillan College Publishing.
Chicago-viite (17. p.)Kesler, Stephen E. Mineral Resources of Economics and the Environment. New York: Macmillan College Publishing, 1994.
MLA-viite (9. p.)Kesler, Stephen E. Mineral Resources of Economics and the Environment. Macmillan College Publishing, 1994.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.