APA (7 वां संस्करण) प्रशस्ति पत्र

(1981). An Environmental bibliography: Publications issued by unep or under its auspices 1973-1980. United Nations Environment Programme.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

An Environmental Bibliography: Publications Issued by Unep or Under Its Auspices 1973-1980. Nairobi: United Nations Environment Programme, 1981.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

An Environmental Bibliography: Publications Issued by Unep or Under Its Auspices 1973-1980. United Nations Environment Programme, 1981.