Aflahatun, N., and Y. Prihatin. “The Use of Google Drive to Improve Student’s Essay Writing Skill, Faculty of Teacher Training and Education, Pancasakti University of Tegal”. Cakrawala: Jurnal Pendidikan, vol. 12, no. 2, Nov. 2018, pp. 112-20, doi:10.24905/cakrawala.v12i2.142.