KAPASITAS KOPERTAIS DALAM PENINGKATAN MUTU PERGURUAN TINGGI AGAMA ISLAM SWASTA (PTAIS): STUDI KASUS DI KOPERTAIS WILAYAH VIII SUMATERA BARAT: THE CAPACITY OF PRIVATE UNIVERSITY COORDINATING BODY (KOPERTAIS) IN IMPROVING THE QUALITY OF PRIVATE ISLAMIC HIGHER EDUCATION (PTAIS): A CASE STUDY IN THE REGION VIII WEST SUMATRA. penamas 2017, 28 (1), 91-106.