Hanun, Nur Ravita, et al. “Optimizing the Internal Audit Function of Muhammadiyah Higher Education: Optimalisasi Fungsi Internal Audit Perguruan Tinggi Muhammadiyah”. Procedia of Social Sciences and Humanities, vol. 3, July 2022, pp. 1271-80, doi:10.21070/pssh.v3i.278.