et al., Lee Wei Jie. “A COMPARATIVE STUDY BETWEEN BREATHING CONTROL AND PURSED LIP BREATHING AMONG BRONCHIAL ASTHMA PATIENTS”. International Journal of Advanced Science and Technology 28, no. 16 (November 21, 2019): 1643 - 1648. Accessed May 8, 2024. http://sersc.org/journals/index.php/IJAST/article/view/2155.