APA (7 वां संस्करण) प्रशस्ति पत्र

P, C. W. (2008). Principles of Environmental Science: Inquiry and Applications (1st edition.). Tata McGraw-Hill.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

P, Cunningham W. Principles of Environmental Science: Inquiry and Applications. 1st edition. New Delhi: Tata McGraw-Hill, 2008.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

P, Cunningham W. Principles of Environmental Science: Inquiry and Applications. 1st edition. Tata McGraw-Hill, 2008.