kilany, e. s. m. (1980). regional disparities and urban settlement system: The case of egypt. the institute of national planning.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)kilany, el- sayed m. Regional Disparities and Urban Settlement System: The Case of Egypt. cairo: the institute of national planning, 1980.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)kilany, el- sayed m. Regional Disparities and Urban Settlement System: The Case of Egypt. the institute of national planning, 1980.