Tamarina, Frea Astrilia, et al. “Efficiency of Inpatient Care Services at Surabaya Islamic Hospital in 2022-2023 Using the Barber-Johnson Approach: Efficiency Analysis of Inpatient Ward at Rumah Sakit Islam (RSI) Surabaya in 2022-2023 With Barber Johnson Approach”. Qanun Medika - Medical Journal Faculty of Medicine Muhammadiyah Surabaya, vol. 10, no. 01, Jan. 2026, doi:10.30651/jqm.v10i01.27393.