Millatana, Maria Ernawati. “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, no. 2 (November 1, 2019): 76-85. Accessed September 28, 2022. https://jurnal-dikpora.jogjaprov.go.id/index.php/jurnalideguru/article/view/97.