CUNNINGHAM, W. P., CUNNINGHAM, M. A., & SAIGO, B. W. (2003). Environmental science: A global concern.-- ed.7. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)CUNNINGHAM, William P., Mary Ann CUNNINGHAM, agus Barbara Woodworth SAIGO. Environmental Science: A Global Concern.-- Ed.7. Boston: McGraw-Hill, 2003.
Lua MLA (9ú heag.)CUNNINGHAM, William P., et al. Environmental Science: A Global Concern.-- Ed.7. McGraw-Hill, 2003.
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