Pakpahan, B. M. T., N. . Aziz, N. P. J. L. Dewi, and D. Mahendika. “How Does Problem Based Learning Work on Students’ Writing Ability? (CAR Study)”. Journal of English Culture, Language, Literature and Education, vol. 11, no. 1, Mar. 2023, pp. 14-27, doi:10.53682/eclue.v11i1.5880.