el-haddad, M., & amer, r. (1965). application of linear programming to curve fitting and theory of approximation. the institute of national planning.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)el-haddad, M.S, و roshdi amer. Application of Linear Programming to Curve Fitting and Theory of Approximation. cairo: the institute of national planning, 1965.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)el-haddad, M.S, و roshdi amer. Application of Linear Programming to Curve Fitting and Theory of Approximation. the institute of national planning, 1965.