NAINGGOLAN, H. N. Project Based Learning Pengolahan Roti Manis SMK Negeri 1 Batangtoru. Khidmat: Jurnal Pendidikan dan Ilmu Sosial, [S. l.], v. 2, n. 2, p. 338–342, 2024. DOI: 10.65311/j.khidmat.v2i2.954. Disponível em: https://ejournal.edutechjaya.com/index.php/khidmat/article/view/954. Acesso em: 25 may. 2026.