APA (7 ম সংস্করণ) উদ্ধৃতি

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

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

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

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

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