El-Kholy, O. A., & Tolba, M. K. (1992). The world environment 1972-1992: Two decades of challenge. Chapman & Hall.
Chicago Style (17th ed.) CitationEl-Kholy, O. A., and Mostafa Kamal Tolba. The World Environment 1972-1992: Two Decades of Challenge. London: Chapman & Hall, 1992.
MLA (9th ed.) CitationEl-Kholy, O. A., and Mostafa Kamal Tolba. The World Environment 1972-1992: Two Decades of Challenge. Chapman & Hall, 1992.
Warning: These citations may not always be 100% accurate.