ANSYAH, Eko Hardi. Modul Laboratorium Observasi. Umsida Press, [S. l.], p. 1–61, 2021. DOI: 10.21070/2021/978-623-6081-23-5. Disponível em: https://press.umsida.ac.id/index.php/umsidapress/article/view/978-623-6081-23-5. Acesso em: 3 jul. 2025.