“PENINGKATAN NILAI UJI BULK DAN NILAI DAYA REGANG PADA MUTU KERTAS CETAK A”. JOURNAL OF SCIENCE AND SOCIAL RESEARCH 9, no. 1 (February 4, 2026): 32–37. Accessed April 14, 2026. https://jurnal.goretanpena.com/index.php/JSSR/article/view/5718.