Okta DOF. An Analysis of Politeness Strategies on Students Communications in Second Semester of English Education Department at Muhammadiyah Kotabumi University Academic Year 2021/2022. griya-cendikia [Internet]. 2023 Feb. 2 [cited 2023 Sep. 22];8(1):187-9. Available from: https://juma.umko.ac.id/index.php/griya-cendikia/article/view/465