Suwardianto, Heru, and Dyah Ayu Kartika Wulan Sari. 2020. “Environmental Factors of Sleep Hygiene That Influence The Level of Pain on Criticall Ill Patients in Intensive Care Unit”. STRADA : Jurnal Ilmiah Kesehatan 9 (1):26-34. https://doi.org/10.30994/sjik.v9i1.266.