Cunningham, W. P., Cunningham , M. A., & Woodworth , B. (2003). Environmental science: A global concern (7th ed.). McGraw-Hill.
Chicago-čujuhus (17. p.)Cunningham, William P., Mary Ann Cunningham , juo Barbara Woodworth. Environmental Science: A Global Concern. 7th ed. New York: McGraw-Hill, 2003.
MLA-čujuhus (9. p.)Cunningham, William P., et al. Environmental Science: A Global Concern. 7th ed. McGraw-Hill, 2003.
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