Ayedh Alqahtani และ Andrew Whyte. (2015) Application of cost significant items towards improving estimation for life cycle costing of building projects. ISEC Press:ม.ป.ท.Ayedh Alqahtani และ Andrew Whyte. 2015. Application of cost significant items towards improving estimation for life cycle costing of building projects. ม.ป.ท.:ISEC Press;Ayedh Alqahtani และ Andrew Whyte. Application of cost significant items towards improving estimation for life cycle costing of building projects. ม.ป.ท.:ISEC Press, 2015. Print.