Alava, J. B. C., Vera, L. E. A., Tipán, V. F. and 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), pp. 232–242. doi: 10.53730/ijssh.v5n3.2028.