Healthline. //www.healthline.com/health/diaphragmatic-breathing
Diakses pada 3 Oktober 2019Healthline. //www.healthline.com/health/how-to-breathe
Diakses pada 3 oktober 2019Live Strong. //www.livestrong.com/article/310564-chest-vs-stomach-breathing/
Diakses pada 3 Oktober 2019American Lung Association. //www.lung.org/about-us/blog/2018/06/you-might-be-breathing-wrong.html
Diakses pada 3 Oktober 2019