รัตนกัลยา ข. Coaching on Breathing Exercise by Applying Incentive Spirometer in Post-Operative Patients. J Royal Thai Army Nurses [Internet]. 2018 Aug. 30 [cited 2024 May 2];19:1-9. Available from: https://he01.tci-thaijo.org/index.php/JRTAN/article/view/155695