Nebel, B. J., Wright, R. T., & Wright, R. T. (1996). Environmental science: The way the world works (5th, 7th ed.). New Jersey: Prentice Hall.
Παραπομπή Chicago StyleNebel, Bernard J., Richard T. Wright, and Richard T. Wright. Environmental Science: The Way the World Works. 5th, 7th ed. New Jersey: Prentice Hall, 1996.
Παραπομπή MLANebel, Bernard J., Richard T. Wright, and Richard T. Wright. Environmental Science: The Way the World Works. 5th, 7th ed. New Jersey: Prentice Hall, 1996.
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