Ratree Siriponbun และผู้แต่งคนอื่นๆ. (2004) Knowledge attitude, and practice about physical activity among people at Huai Yot District, Trang Province. Chulalongkorn University:ม.ป.ท.Ratree Siriponbun และผู้แต่งคนอื่นๆ. 2004. Knowledge attitude, and practice about physical activity among people at Huai Yot District, Trang Province. ม.ป.ท.:Chulalongkorn University;Ratree Siriponbun และผู้แต่งคนอื่นๆ. Knowledge attitude, and practice about physical activity among people at Huai Yot District, Trang Province. ม.ป.ท.:Chulalongkorn University, 2004. Print.