Supaporn Suwanpitak. (2005) Comparative study between benchmarking and self evaluation for improvement of working environment. Mahidol University,:ม.ป.ท.Supaporn Suwanpitak. 2005. Comparative study between benchmarking and self evaluation for improvement of working environment. ม.ป.ท.:Mahidol University,;Supaporn Suwanpitak. Comparative study between benchmarking and self evaluation for improvement of working environment. ม.ป.ท.:Mahidol University, 2005. Print.