Allen, M. K. T. s. a. e. b. R. L. a. P. Earth matters environmental challenges for the 1980s. United Nations Environment Programme.
Chicago Style (17th ed.) CitationAllen, Mostafa Kamal Tolba selected and edited by Robert Lamb and Patrck. Earth Matters Environmental Challenges for the 1980s. United Nations Environment Programme.
MLA (8th ed.) CitationAllen, Mostafa Kamal Tolba selected and edited by Robert Lamb and Patrck. Earth Matters Environmental Challenges for the 1980s. United Nations Environment Programme.
Warning: These citations may not always be 100% accurate.