Karmiza, K., M. Muharriza, and E. Huriani. “Left Lateral Positioning With Head Elevation Increase The Partial Pressure of Oxygen on Patients With Mechanical Ventilation”. Jurnal Ners, vol. 9, no. 1, Jan. 2017, pp. 59-65, doi:10.20473/jn.v9i1.2979.