Chansak Assawasirisilp และผู้แต่งคนอื่นๆ. (1999) An investigation of "professionalism" in Thai private universities. National Institute of Development Administration:ม.ป.ท.Chansak Assawasirisilp และผู้แต่งคนอื่นๆ. 1999. An investigation of "professionalism" in Thai private universities. ม.ป.ท.:National Institute of Development Administration;Chansak Assawasirisilp และผู้แต่งคนอื่นๆ. An investigation of "professionalism" in Thai private universities. ม.ป.ท.:National Institute of Development Administration, 1999. Print.