Sirait, M., S. Gea, N. Siregar, N. Bukit, E.M. Ginting, and R.F. Zega. 2018. “Fabrication of Poly(vinyl Alcohol) Bentonite Nanocomposites Using Sol-Gel Method”. Asian Journal of Chemistry 30 (10):2210-14. https://doi.org/10.14233/ajchem.2018.21388.