Saranya Rattanathaworn และ Pandej Chintrakarn. (2010) The effectiveness of busy directors on corporate performance. Mahidol University:ม.ป.ท.Saranya Rattanathaworn และ Pandej Chintrakarn. 2010. The effectiveness of busy directors on corporate performance. ม.ป.ท.:Mahidol University;Saranya Rattanathaworn และ Pandej Chintrakarn. The effectiveness of busy directors on corporate performance. ม.ป.ท.:Mahidol University, 2010. Print.