Onny Fitriana Sitorus. “The Importance of Cognitive Ability for Chair of Study Programs in Muhammadiyah University: Urgensi Kepemilikan Kemampuan Kognitif Keprodian Bagi Ketua Program Studi Di Perguruan Tinggi Muhammadiyah”. Indonesian Journal of Education Methods Development 7 (August 19, 2019): 10.21070/ijemd.v5i1.41. Accessed May 12, 2024. https://ijemd.umsida.ac.id/index.php/ijemd/article/view/41.