Tamarina, Frea Astrilia, Heru Suswojo, and Sholihul Absor. “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 10, no. 01 (January 28, 2026). Accessed January 29, 2026. https://journal.um-surabaya.ac.id/qanunmedika/article/view/27393.