Kanjanar Pintakham และ Wattasit Siriwong. (2016) Prevalence and Risk Factors Associated with Musculoskeletal Discomfort among Street Sweepers in Chiang Rai Province, Thailand. <i>Journal of Health Research</i>, <i>30</i>(3), 207.Kanjanar Pintakham และ Wattasit Siriwong. "Prevalence and Risk Factors Associated with Musculoskeletal Discomfort among Street Sweepers in Chiang Rai Province, Thailand". Journal of Health Research 30 (2016):207.Kanjanar Pintakham และ Wattasit Siriwong. Prevalence and Risk Factors Associated with Musculoskeletal Discomfort among Street Sweepers in Chiang Rai Province, Thailand. Chulalongkorn University Press:ม.ป.ท. 2016.