Akmal Johan, Ridwan, Mujamilah, and Ramlan. 2007. “MAGNETIK NANOKRISTALIN BARIUM HEKSAFERIT (BaO 6Fe2O3) HASIL PROSES HIGH ENERGY MILLING”. Jurnal Sains Materi Indonesia 8 (4):120-25. https://doi.org/10.17146/jusami.2007.0.0.5120.