[1]
Daniel Ganda Putra Sihombing et al. 2023. The Effect Of Reinforcement On Writing Skill At Eleventh Grade Students In SMK Negeri 1 Pematang Siantar . Jurnal Ilmu Pendidikan dan Sosial. 2, 3 (Oct. 2023), 381–389. DOI:https://doi.org/10.58540/jipsi.v2i3.447.