Saputra, E.; Utama, P. S.; HS, I.; Simatupang, M. D. V.; Prawiranegara, B. A.; Abid, H. R.; Muraza, O. Spent Bleaching Earth Supported CeFeO3 Perovskite for Visible Light Photocatalytic Oxidation of Methylene Blue. J. Appl. Mat. Tech. 2020, 1, 81-87.