HARTONO, H. G.; PAMBUDI, S. Gunung Api Purba Mujil, Kulonprogo, Yogyakarta: Suatu Bukti Dan Pemikiran. ReTII, [S. l.], 2017. Disponível em: https://journal.itny.ac.id/index.php/ReTII/article/view/261. Acesso em: 2 may. 2025.