BAHRUDIN, Dinar Vincy Yunitaka. Improving Students’ Speaking Ability on Expressing Plan through Problem Based Learning (PBL) Method. OKARA: Jurnal Bahasa dan Sastra, [S. l.], v. 12, n. 2, p. 271–278, 2018. DOI: 10.19105/ojbs.v12i2.2086. Disponível em: https://siakaddev.iainmadura.ac.id/index.php/okara/article/view/2086. Acesso em: 31 jul. 2026.