Anggit Kristiawan, Timotius, et al. “Design and Performance Testing of a Keychain Product Mold for a Learning Module in the Metrology and Plastic Moulding Laboratory at XYZ”. Jurnal Rekayasa Mesin, vol. 20, no. 3, Dec. 2025, pp. 467-74, doi:10.32497/jrm.v20i3.6563.