Siriwat Chaihanit และ Prathurng Hongsranagon. (2009) Factors influencing health behaviors of elders in Mueang district, Roi Et province, Thailand. Chulalongkorn University:ม.ป.ท.Siriwat Chaihanit และ Prathurng Hongsranagon. 2009. Factors influencing health behaviors of elders in Mueang district, Roi Et province, Thailand. ม.ป.ท.:Chulalongkorn University;Siriwat Chaihanit และ Prathurng Hongsranagon. Factors influencing health behaviors of elders in Mueang district, Roi Et province, Thailand. ม.ป.ท.:Chulalongkorn University, 2009. Print.