(1)
Guidang, E. P. B.; Alagao, C. Q.; Alvarez, M. B.; Carreon, J. B. T.; Alcalde, M. A.; Quintinita, L. L. Interactive Ilokano Mother Tongue-Based Courseware for Grade 1 Mathematics: Development and Usability. IRJ 2015, 6 (1), 46-60. https://doi.org/10.7719/irj.v6i1.362.