PURWANINGSIH, Ratna; SIMANJUNTAK, Christoper Frans; ROSYADA, Zainal Fanani. Eco-Efficiency of Pencil Preduction Using Life Cycle Assessment to Increase the Manufacture Sustainability. Jurnal Teknik Industri: Jurnal Keilmuan dan Aplikasi Teknik Industri, [S. l.], v. 22, n. 1, p. 47–54, 2020. DOI: 10.9744/jti.22.1.47-52. Disponível em: https://jurnalindustri.petra.ac.id/index.php/ind/article/view/22504. Acesso em: 12 oct. 2025.