S. N. K. Tarigan, S. Humaidi, M. Rianna, and N. M. R. Nasution, “Effect of NaOH Concentration on Magnetic Properties and Structural Studies of MgFe2O4 Based on Natural Iron Sand Synthesized by Co-Precipitation Method”, J. Prisma. Sains, vol. 11, no. 2, pp. 636–641, Apr. 2023.