De Laurent, Defant, Sumadi, Kendall Malik, and Rahmad Washinton. “INOVASI PERANCANGAN JAM TANGAN SEBAGAI PERWUJUDAN OPTIMALISASI MATERIAL LIMBAH BATOK KELAPA”. EZRA SCIENCE BULLETIN 3, no. 2 (July 30, 2025): 1337–1345. Accessed June 25, 2026. https://ezra.krabulletin.com/index.php/ezrascibin/article/view/390.