Sanya Raksarut และ Prathurng Hongsranagon. (2007) Work morale of public health personnel at Health Center in Krabi Province. Chulalongkorn University:ม.ป.ท.Sanya Raksarut และ Prathurng Hongsranagon. 2007. Work morale of public health personnel at Health Center in Krabi Province. ม.ป.ท.:Chulalongkorn University;Sanya Raksarut และ Prathurng Hongsranagon. Work morale of public health personnel at Health Center in Krabi Province. ม.ป.ท.:Chulalongkorn University, 2007. Print.