Mohamed-Asem Abdul-Malak และ Farah Youssef. (2016) Understanding the Engineer's role in administering the construction contract. ISEC Press:ม.ป.ท.Mohamed-Asem Abdul-Malak และ Farah Youssef. 2016. Understanding the Engineer's role in administering the construction contract. ม.ป.ท.:ISEC Press;Mohamed-Asem Abdul-Malak และ Farah Youssef. Understanding the Engineer's role in administering the construction contract. ม.ป.ท.:ISEC Press, 2016. Print.