Paktaranart Ruankaewa และผู้แต่งคนอื่นๆ. (2015) Case study : occupational stress and sleep quality related factors among machinery service offshore workers. Mahidol University:ม.ป.ท.Paktaranart Ruankaewa และผู้แต่งคนอื่นๆ. 2015. Case study : occupational stress and sleep quality related factors among machinery service offshore workers. ม.ป.ท.:Mahidol University;Paktaranart Ruankaewa และผู้แต่งคนอื่นๆ. Case study : occupational stress and sleep quality related factors among machinery service offshore workers. ม.ป.ท.:Mahidol University, 2015. Print.