TAMPUBOLON, Nandito; SIAAHAN, Mungkap M.; HUTABARAT, Novra Melisa P. The Effect Of Problem Based Learning (PBL) On Student’s Writing Skill Of The Eleventh Grade . Jurnal Ilmu Pendidikan dan Sosial, [S. l.], v. 4, n. 4, p. 937–948, 2026. DOI: 10.58540/jipsi.v4i4.1312. Disponível em: https://putrapublisher.org/index.php/jipsi/article/view/1312. Acesso em: 7 jun. 2026.