DANIEL GANDA PUTRA SIHOMBING; DAVID TOGI HUTAHAEAN; YANTI KRISTINA SINAGA; TIARMA INTAN MARPAUNG; ANITA SITANGGANG. The Effect Of Reinforcement On Writing Skill At Eleventh Grade Students In SMK Negeri 1 Pematang Siantar . Jurnal Ilmu Pendidikan dan Sosial, [S. l.], v. 2, n. 3, p. 381–389, 2023. DOI: 10.58540/jipsi.v2i3.447. Disponível em: https://putrapublisher.org/ojs/index.php/jipsi/article/view/447. Acesso em: 17 apr. 2026.