Sulmeni, E., and D. K. Walanda. “Effectiveness of Google Classroom in Chemistry Learning on Stoichiometry Topic Viewed from Students’ Learning Motivation”. Jurnal Akademika Kimia, vol. 9, no. 4, Nov. 2020, pp. 199-04, doi:10.22487/j24775185.2020.v9.i4.pp199-204.