ETIS, Nyong. Buku Ajar Mata Kuliah Filsafat Ilmu. Umsida Press, [S. l.], p. 1–57, 2021. DOI: 10.21070/2019/978-623-7578-21-5. Disponível em: https://press.umsida.ac.id/index.php/umsidapress/article/view/978-623-7578-21-5. Acesso em: 3 jul. 2025.