Kanokthip Sawangjaithum และผู้แต่งคนอื่นๆ. (2017) Comparison of respiratory muscle strength between cigarettes smokers, second-hand smokers and non-cigarettes smokers. <i>Journal of Associated Medical Sciences</i>, <i>50</i>(1), 132-137.Kanokthip Sawangjaithum และผู้แต่งคนอื่นๆ. "Comparison of respiratory muscle strength between cigarettes smokers, second-hand smokers and non-cigarettes smokers". Journal of Associated Medical Sciences 50 (2017):132-137.Kanokthip Sawangjaithum และผู้แต่งคนอื่นๆ. Comparison of respiratory muscle strength between cigarettes smokers, second-hand smokers and non-cigarettes smokers. Faculty of Associated Medical Sciences, Chiang Mai University:ม.ป.ท. 2017.