APA (7 वां संस्करण) प्रशस्ति पत्र
Cunningham, W. P., & Cunningham, M. A. (2004). Principles of environmental science: Inquiry and applications (2nd ed.). McGraw-Hill Higher Education; Tata McGraw-Hill.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Cunningham, William P., और Mary Ann Cunningham. Principles of Environmental Science: Inquiry and Applications. 2nd ed. Boston ; New Delhi: McGraw-Hill Higher Education; Tata McGraw-Hill, 2004.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Cunningham, William P., और Mary Ann Cunningham. Principles of Environmental Science: Inquiry and Applications. 2nd ed. McGraw-Hill Higher Education; Tata McGraw-Hill, 2004.
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