Ghufron MA, Ermawati S. The Framework of Cooperative Problem-based Learning (Co-PBL) to Promote Verbal Creativity in EFL Writing: Is It Feasible?. Arbitrer [Internet]. 2018 Oct. 29 [cited 2026 Feb. 27];5(2):81-93. Available from: https://arbitrer.fib.unand.ac.id/index.php/arbitrer/article/view/116