R. K. Sihombing, J. L. Sihombing, and S. Amdayani, “PENGEMBANGAN LEMBAR KERJA PESERTA DIDIK (LKPD) BERBASIS STEM (SCIENCE, TECHNOLOGY, ENGINEERING, AND MATHEMATICS) PADA MATERI LAJU REAKSI”, JS, vol. 6, no. 3, pp. 26–31, Jun. 2022.