Maret Jerman Samosir. “EVALUASI PROGRAM PENGGUNAAN HELM KESELAMATAN DI PROYEK KONSTRUKSI”. Kohesi: Jurnal Sains dan Teknologi 7, no. 1 (January 22, 2025): 31–40. Accessed August 3, 2025. https://ejournal.warunayama.org/index.php/kohesi/article/view/10948.