Farahat, A. M. (1977). Some Experience, with Network Schedule Modelling of A Cement Firm: "The Tourah Co. Case". The Institute of National Planning.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Farahat, Ahmed M. Some Experience, with Network Schedule Modelling of A Cement Firm: "The Tourah Co. Case". Cairo: The Institute of National Planning, 1977.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Farahat, Ahmed M. Some Experience, with Network Schedule Modelling of A Cement Firm: "The Tourah Co. Case". The Institute of National Planning, 1977.