Panrampai Thaitrong และ Mantana Vongsirinavarat. (2010) Six-minute walk test in elderly thais aged 60-80 years from elderly clubs in Bangkok. Mahidol University:ม.ป.ท.Panrampai Thaitrong และ Mantana Vongsirinavarat. 2010. Six-minute walk test in elderly thais aged 60-80 years from elderly clubs in Bangkok. ม.ป.ท.:Mahidol University;Panrampai Thaitrong และ Mantana Vongsirinavarat. Six-minute walk test in elderly thais aged 60-80 years from elderly clubs in Bangkok. ม.ป.ท.:Mahidol University, 2010. Print.