KURNIADI, Sugeng. Pembuatan Alat Uji Impak Charpy Untuk Material Plastik Dengan Takik. Jurnal Teknik Mesin (Journal Of Mechanical Engineering), Jakarta, Indonesia, v. 8, n. 1, p. 20–24, 2019. DOI: 10.22441/jtm.v8i1.5367. Disponível em: https://publikasi.mercubuana.ac.id/index.php/jtm/article/view/5367. Acesso em: 3 jun. 2026.