Mardiah, Enok, Suharmadi Suharmadi, Farrah Anis Fazliatul Adnan, Jong Soo Rhee, and Dianta Ginting. 2026. “Influence of Water and Oil Quenching on the Microstructure and Mechanical Properties of S45C Steel”. SINERGI 30 (2). Jakarta, Indonesia:337-46. https://doi.org/10.22441/sinergi.2026.2.002.