Mayasari, R. A., S. Goenharto, and A. Sjafei. “Betel Leaf Toothpastes Inhibit Dental Plaque Formation on Fixed Orthodontic Patients”. Dental Journal, vol. 44, no. 4, Dec. 2011, pp. 169-72, doi:10.20473/j.djmkg.v44.i4.p169-172.