Prasetyo, N.E. and Rusman , A. 2023. The Effectiveness of the 300 and 450 Semifowler Positions on Changes in Oxygen Saturation in Pneumonia Patients Installed Ventilator in ICU Room RSPI Sulianti Saroso . Jurnal Keperawatan Komprehensif (Comprehensive Nursing Journal). 9, SpecialEdition (Jun. 2023). DOI:https://doi.org/10.33755/jkk.v9iSpecial Edition.542.