Keren Stelin Maliangkay, Ummi Rahma, Safanny Putri, and Acim Heri Iswanto. “Peningkatan Mutu Pelayanan Kesehatan Di Rumah Sakit Dengan Metode Six Sigma : Literature Review”. An-Najat 1, no. 2 (June 21, 2023): 29–38. Accessed July 6, 2024. https://jurnal.stikes-ibnusina.ac.id/index.php/an-Najat/article/view/33.