Pawina Yennan และผู้แต่งคนอื่นๆ. (2009) Effects of aquatic exercise and land-based exercise on postural sway in elderly with knee osteoarthritis. Chulalongkorn University:ม.ป.ท.Pawina Yennan และผู้แต่งคนอื่นๆ. 2009. Effects of aquatic exercise and land-based exercise on postural sway in elderly with knee osteoarthritis. ม.ป.ท.:Chulalongkorn University;Pawina Yennan และผู้แต่งคนอื่นๆ. Effects of aquatic exercise and land-based exercise on postural sway in elderly with knee osteoarthritis. ม.ป.ท.:Chulalongkorn University, 2009. Print.