HARYANTO, Haryanto. Enhancing English Learning Achievement through Problem Based Learning: An Action Research at SMAN 1 Jepara. IJOLTL (Indonesian Journal of Language Teaching and Linguistics), [S. l.], v. 5, n. 2, p. 81–94, 2020. DOI: 10.30957/ijoltl.v5i2.620. Disponível em: https://ijotl-tl.soloclcs.org/index.php/ijoltl/article/view/620. Acesso em: 2 apr. 2025.