Ratikorn Buakaew และ Tanawat Likitkererat. (2003) Assessing functional abilities among elderly in Ao Nang Krabi Province. Chulalongkorn University:ม.ป.ท.Ratikorn Buakaew และ Tanawat Likitkererat. 2003. Assessing functional abilities among elderly in Ao Nang Krabi Province. ม.ป.ท.:Chulalongkorn University;Ratikorn Buakaew และ Tanawat Likitkererat. Assessing functional abilities among elderly in Ao Nang Krabi Province. ม.ป.ท.:Chulalongkorn University, 2003. Print.