Iftikhar, A., M. Arif, S. Bibi, and A. Hanif. “Factors Affecting Quality of Sleep in Intensive Care Units of Gulab Devi Chest Hospital and Hameed Latif Hospital, Lahore: Factors Affecting Quality of Sleep in Intensive Care Unit”. Pakistan Journal of Physical Therapy (PJPT), vol. 1, no. 3, Sept. 2020, pp. 25-28, doi:10.52229/pjpt.v1i3.456.