Cheeranun Chinarksorn และ Pongsa Pornchaiwiseskul. (2010) Technical and scale efficiency of health centers in Bangkok Metropolitan area. Chulalongkorn University:ม.ป.ท.Cheeranun Chinarksorn และ Pongsa Pornchaiwiseskul. 2010. Technical and scale efficiency of health centers in Bangkok Metropolitan area. ม.ป.ท.:Chulalongkorn University;Cheeranun Chinarksorn และ Pongsa Pornchaiwiseskul. Technical and scale efficiency of health centers in Bangkok Metropolitan area. ม.ป.ท.:Chulalongkorn University, 2010. Print.