APA (7 वां संस्करण) प्रशस्ति पत्र

Smith, K., & Petley, D. N. (2009). Environmental Hazards: Assessing risk and reducing disaster (5th ed.). Routledge.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Smith, Keith, और David N. Petley. Environmental Hazards: Assessing Risk and Reducing Disaster. 5th ed. London: Routledge, 2009.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Smith, Keith, और David N. Petley. Environmental Hazards: Assessing Risk and Reducing Disaster. 5th ed. Routledge, 2009.