Nebel, B. J., & Wright, R. T. (1998). Environmental science: The way the world works (6th ed.). Upper Saddle River, NJ.: Prentice-Hall.
Παραπομπή Chicago StyleNebel, Bernard J., and Richard T. Wright. Environmental Science: The Way the World Works. 6th ed. Upper Saddle River, NJ.: Prentice-Hall, 1998.
Παραπομπή MLANebel, Bernard J., and Richard T. Wright. Environmental Science: The Way the World Works. 6th ed. Upper Saddle River, NJ.: Prentice-Hall, 1998.
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