Usman, Indrianawati, and Mira Ardiyana. “Lean Hospital Management, Studi Empirik Pada Layanan Gawat Darurat”. Journal of Theory and Applied Management (Jurnal Manajemen Teori dan Terapan) 10, no. 3 (December 22, 2017): 257–270. Accessed January 11, 2025. https://e-journal.unair.ac.id/JMTT/article/view/7089.