Pangemanan, T., Hutabarat, J. E. ., Damopolii, N. A. ., Lompoliu, S. V. ., & Kapahang, C. C. . (2026). Implementation of a Quality Management System in E-Learning Services: A Case Study of Google Classroom. Cerdika: Jurnal Ilmiah Indonesia, 6(3), 1129–1136. https://doi.org/10.59141/cerdika.v6i3.3390