J. P. Calingacion, A. L. M. Dacera, M. G. Castro, J. C. Lubay, R. F. F. C. Bug-os, and J. C. Bansale, “Enhancing graph interpretation skills of Grade 9 students in learning microeconomics through I2 strategy”, Indonesian J. Educ. Ped., vol. 2, no. 1, pp. 47–60, Apr. 2025.