Pakpahan, J. T. B., Sitorus, M., Situmorang, M., Dibyantini, R. E., & Sinaga, M. (2026). Development of Laboratory Virtual Learning Media on Alkene Submaterial. Hydrogen: Jurnal Kependidikan Kimia, 14(3), 569–578. https://doi.org/10.33394/hjkk.v14i3.20980