Front Cover and Preface Vol. 6 No. 2. JTERA (Jurnal Teknologi Rekayasa), [S. l.], v. 6, n. 2, p. i-iv, 2021. DOI: 10.31544/jtera.v6.i2.2021.i-iv. Disponível em: https://jtera.polteksmi.ac.id/index.php/jtera/article/view/576. Acesso em: 27 jul. 2026.