Patraporn Porntepkasemsant and Santi Charoenpornpattana และ -. (2015) Labor Productivity Improvement in Thai Construction Project: Problem Based Approach. ISEC Press:ม.ป.ท.Patraporn Porntepkasemsant and Santi Charoenpornpattana และ -. 2015. Labor Productivity Improvement in Thai Construction Project: Problem Based Approach. ม.ป.ท.:ISEC Press;Patraporn Porntepkasemsant and Santi Charoenpornpattana และ -. Labor Productivity Improvement in Thai Construction Project: Problem Based Approach. ม.ป.ท.:ISEC Press, 2015. Print.