Amorn Upakaew. 2004. A study of stress levels and cortisol changes in female shift workers. Field of Study Industrial Hygiene and Safety, Mahidol University;
Amorn Upakaew. (2004) A study of stress levels and cortisol changes in female shift workers . Mahidol University/Bangkok.
Amorn Upakaew. A study of stress levels and cortisol changes in female shift workers. . Bangkok:Mahidol University, 2004.
Amorn Upakaew. (2004) A study of stress levels and cortisol changes in female shift workers . Mahidol University/Bangkok.