Fione, V. R., J. d’Arc Z. . Adam, and N. M. A. S. . Lestari. “The Effectiveness of Gargling Decoction of Green Betel Leaf (Piper Betle L) and Guava Leaf (Psidium Guajava) Against Plaque Index”. Eduvest - Journal of Universal Studies, vol. 4, no. 7, Aug. 2024, pp. 6371-8, doi:10.59188/eduvest.v4i7.1602.