Bagayas, N. A. L., Bulan, S. A. M., Molina, P. O., & Pandan, M. A. T. (1993). Production of barium ferrite magnets from steel mill scales. College of Engineering.

Bagayas, Nathalie Ann L., Stephanie Ann M. Bulan, Patricia O. Molina, and Mary Ann T. Pandan. Production of Barium Ferrite Magnets from Steel Mill Scales. Quezon City: College of Engineering, 1993.

Bagayas, Nathalie Ann L., et al. Production of Barium Ferrite Magnets from Steel Mill Scales. College of Engineering, 1993.