Alava, J. B. C., Vera, L. E. A., Tipán, V. F., & Pinargote, G. V. L. (2021). Problem-based learning as a methodological strategy in the teaching-learning process. International Journal of Social Sciences and Humanities, 5(3), 232–242. https://doi.org/10.53730/ijssh.v5n3.2028