M. A. . Gawad, “Environmental Sustainable Practices in the Selected Higher Education Institutions in Calapan City”, IJSBAR, vol. 60, no. 3, pp. 31–35, Sep. 2021, Accessed: Mar. 05, 2026. [Online]. Available: https://gssrr.org/JournalOfBasicAndApplied/article/view/13262