“Asesmen Kelayakan Material Praktek Konstruksi Baja di Teknik Sipil PNJ untuk Menghasilkan Produk Layak Jual”. Journal of Research and Inovation in Civil Engineering as Applied Science (RIGID) 1, no. 1 (Oktober 28, 2023): 1–5. Diakses September 27, 2026. https://rigid.jurnal.politap.ac.id/index.php/rigid/article/view/1178.