Higuchi และ Michiyo. (1999) Quality of life and life satisfaction of elderly people in Salaya, Thailand. Mahidol University,:ม.ป.ท.Higuchi และ Michiyo. 1999. Quality of life and life satisfaction of elderly people in Salaya, Thailand. ม.ป.ท.:Mahidol University,;Higuchi และ Michiyo. Quality of life and life satisfaction of elderly people in Salaya, Thailand. ม.ป.ท.:Mahidol University, 1999. Print.