Elisabet Tambunan, Mery Lani Purba, and Idahwati. “Penguatan Produktif Manajemen Perkantoran Dan Layanan Bisnis Bagi Siswa SMK Negeri 1 Sidikalang”. Jurnal Abdimas Mutiara 5, no. 1 (February 3, 2024): 142–147. Accessed January 30, 2026. https://e-journal.sari-mutiara.ac.id/index.php/JAM/article/view/4755.