Surasak Ammartyothin และ Sathirakorn Pongpanich. (2010) Perceptions and satisfactions regarding to the national policy implementation for the elderly : case study in Phrasamutchedi district, Samutprakan province, Thailand. Chulalongkorn University:ม.ป.ท.Surasak Ammartyothin และ Sathirakorn Pongpanich. 2010. Perceptions and satisfactions regarding to the national policy implementation for the elderly : case study in Phrasamutchedi district, Samutprakan province, Thailand. ม.ป.ท.:Chulalongkorn University;Surasak Ammartyothin และ Sathirakorn Pongpanich. Perceptions and satisfactions regarding to the national policy implementation for the elderly : case study in Phrasamutchedi district, Samutprakan province, Thailand. ม.ป.ท.:Chulalongkorn University, 2010. Print.