Phachongchit Kraithaworn และ Yupapin Sirapo-ngam. (2010) Factors predicting physical activity in older Thai adults living in urban poor communities. Mahidol University:ม.ป.ท.Phachongchit Kraithaworn และ Yupapin Sirapo-ngam. 2010. Factors predicting physical activity in older Thai adults living in urban poor communities. ม.ป.ท.:Mahidol University;Phachongchit Kraithaworn และ Yupapin Sirapo-ngam. Factors predicting physical activity in older Thai adults living in urban poor communities. ม.ป.ท.:Mahidol University, 2010. Print.