Siregar, R., S, S., & Aritonang, N. J. (2021). the Effectiveness of Red Betel (Piper crocatum) Leaf Ethanol Extract Mouthwash in Reducing Dental Plaque Index. Asian Journal of Pharmaceutical Research and Development, 9(1), 5–7. https://doi.org/10.22270/ajprd.v9i1.902