SEMBIRING, E. M. B.; SIANTURI, S.; SIMANJUNTAK, F. M. P.; TARIGAN, S. N. The Students’ Strategies in Online Learning Interaction: Exploring Politeness in Google Classroom during Covid-19 Pandemic. Elsya : Journal of English Language Studies, v. 3, n. 3, p. 205-214, 11 Sep. 2021.