sulviana, sulviana. “The Impact of Lecturer’s Speech Act in EFL Classroom (A Case at a Higher Education of LLDikti IX)”. JEC (Journal of Education and Counseling) 1, no. 1 (August 8, 2018): 39–51. Accessed May 2, 2024. https://journal.unugiri.ac.id/index.php/JEC/article/view/167.