Purwati PD, Afifah NU. Developing Language Study Textbooks: An Effort to Understand Discourse Theory Using Basic Literacy Based on Problem Solving Model. JOLLT [Internet]. 2025 Oct. 21 [cited 2025 Nov. 20];13(4):1664-79. Available from: https://ojspanel.undikma.ac.id/index.php/jollt/article/view/15565