APA (7 वां संस्करण) प्रशस्ति पत्र

Porteous, A. (1992). Dictionary of environmental science and technology (Rev. ed.). Wiley.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Porteous, Andrew. Dictionary of Environmental Science and Technology. Rev. ed. Chichester, Eng: Wiley, 1992.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Porteous, Andrew. Dictionary of Environmental Science and Technology. Rev. ed. Wiley, 1992.