Atsuhiko Ota และ Nopporn Howteerakul. (2013) Saliva cortisol and dehydroepiandrosterone (DHEA) as biochemical indicator to evaluate job stress. Mahidol University:ม.ป.ท.Atsuhiko Ota และ Nopporn Howteerakul. 2013. Saliva cortisol and dehydroepiandrosterone (DHEA) as biochemical indicator to evaluate job stress. ม.ป.ท.:Mahidol University;Atsuhiko Ota และ Nopporn Howteerakul. Saliva cortisol and dehydroepiandrosterone (DHEA) as biochemical indicator to evaluate job stress. ม.ป.ท.:Mahidol University, 2013. Print.