Symposium on the Impact of Urbanization pn Man's Environment, UAW Family Education Centre, Onaway, Michigan, 1970, & Interntional Union. Automobile, Aerospace and Agricultural Implement Wokers of America. (1971). The impact of urbanization on man's environment, papers and proceedings. United Nations.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Symposium on the Impact of Urbanization pn Man's Environment, UAW Family Education Centre, Onaway, Michigan, 1970, و Aerospace and Agricultural Implement Wokers of America Interntional Union. Automobile. The Impact of Urbanization on Man's Environment, Papers and Proceedings. New York: United Nations, 1971.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Symposium on the Impact of Urbanization pn Man's Environment, UAW Family Education Centre, Onaway, Michigan, 1970, و Aerospace and Agricultural Implement Wokers of America Interntional Union. Automobile. The Impact of Urbanization on Man's Environment, Papers and Proceedings. United Nations, 1971.