Ongkanok Sungprakorn และ Sookjaroen Tangwongchai. (2019) Depression and associated factors in retired employees at Department of Internal Medicine, Outpatient Clinic, Metropolitan Electricity Authority Hospital. <i>Chulalongkorn Medical Bulletin</i>, <i>1</i>(4), 393-402.Ongkanok Sungprakorn และ Sookjaroen Tangwongchai. "Depression and associated factors in retired employees at Department of Internal Medicine, Outpatient Clinic, Metropolitan Electricity Authority Hospital". Chulalongkorn Medical Bulletin 1 (2019):393-402.Ongkanok Sungprakorn และ Sookjaroen Tangwongchai. Depression and associated factors in retired employees at Department of Internal Medicine, Outpatient Clinic, Metropolitan Electricity Authority Hospital. Faculty of Medicine Chulalongkorn University:ม.ป.ท. 2019.