Purnawati P. The Implication of Teachers’ Question and Feedback to the Students Vocabulary Production: an Analysis of Spoken Discourse of EFL Classrooms using IRF Model. Foremost [Internet]. 2021 Aug. 31 [cited 2026 Jun. 17];2(2):8-15. Available from: http://103.85.60.83/index.php/Foremost/article/view/1738