Onny Fitriana Sitorus. (2019). 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, 10.21070/ijemd.v5i1.41. https://doi.org/10.21070/ijemd.v5i1.41