Ndruru, H. M. P. ., E. Sormin, L. S. L. . Purba, and F. N. . Simanjuntak. “Development of Environmentally Based E-STUDENT WORKSHEET for Chemistry Practices”. Journal of Science and Education (JSE), vol. 6, no. 2, Jan. 2026, pp. 1381-93, doi:10.58905/jse.v6i2.637.