Haruthai Sukcharoenkosol และ Sudaduang Krisdapong. (2016) Evaluation of workplace oral health promotion in Kaengkhoi district, Saraburi province : a positive approach. Chulalongkorn University:ม.ป.ท.Haruthai Sukcharoenkosol และ Sudaduang Krisdapong. 2016. Evaluation of workplace oral health promotion in Kaengkhoi district, Saraburi province : a positive approach. ม.ป.ท.:Chulalongkorn University;Haruthai Sukcharoenkosol และ Sudaduang Krisdapong. Evaluation of workplace oral health promotion in Kaengkhoi district, Saraburi province : a positive approach. ม.ป.ท.:Chulalongkorn University, 2016. Print.