Nurgiyanta, Ariefkhoerulummah, and Galih Noor Alivian. “Implementation Of Pursed Lip Breathing And Semi Fowler Position in COPD Patients Which Get Nebulizer in IGD: A Literature Review”. Journal of Bionursing 2, no. 3 (November 30, 2020): 208-214. Accessed May 5, 2024. http://bionursing.fikes.unsoed.ac.id/bion/index.php/bionursing/article/view/74.