S. Ismail, T. Maasum, and N. Ahmad, “PROBLEM BASED COOPERATIVE LEARNING AND ITS POTENTIAL IN ENHANCING LANGUAGE LEARNERS HIGHER ORDER THINKING SKILLS (HOTS)”, FRASA, vol. 3, no. 1, pp. 50–63, Mar. 2022, doi: 10.47701/frasa.v3i1.2178.