L. S. L. Purba, E. Sormin, L. A. A. Zebua, and C. D. G. L. Laigo, “Enhancing Conceptual Mastery of Green Chemistry Through Pinakbet-Themed Crossword Puzzles: An Ethnopedagogical Evaluation”, phen, vol. 15, no. 2, pp. 372–396, Oct. 2025.