Porraporn Sriwannawit และผู้แต่งคนอื่นๆ. (2021) Effects of positive expiratory pressure and breath stacking training on pulmonary function in cardiac surgery patients: a randomized controlled trial. <i>Archives of Allied Health Sciences</i>, <i>33</i>(3), 16-28.Porraporn Sriwannawit และผู้แต่งคนอื่นๆ. "Effects of positive expiratory pressure and breath stacking training on pulmonary function in cardiac surgery patients: a randomized controlled trial". Archives of Allied Health Sciences 33 (2021):16-28.Porraporn Sriwannawit และผู้แต่งคนอื่นๆ. Effects of positive expiratory pressure and breath stacking training on pulmonary function in cardiac surgery patients: a randomized controlled trial. Faculty of Associated Medical Sciences, Khon Kaen University, Thailand:ม.ป.ท. 2021.