Millatana, M. E. (2019) “The Impact Of Blended Learning Method Employing Google Classroom On The Improvement Of Student Learning Achievement On The Topic Of Matrix In Class XI IPS 1 SMA Negeri 7 Yogyakarta”, Ideguru: Jurnal Karya Ilmiah Guru, 4(2), pp. 76-85. doi: 10.51169/ideguru.v4i2.97.