Wirawan, Nandar, Nandi Periadi, and M Iqbal Kusuma. “The Effect of Intervention on Semi Fowler and Fowler Positions on Increasing Oxygen Saturation in Heart Failure Patients”. KESANS : International Journal of Health and Science 1, no. 11 (August 20, 2022): 992–1006. Accessed February 12, 2026. https://www.kesans.rifainstitute.com/index.php/kesans/article/view/104.