Molek, Dwi Setya Rini, and Mangatas Halomoan Parluhutan Hutagulung. “The Efficacy of the Consumption of Manalagi Apples and Fuji Apples on Decreasing Plaque Index in Students of Madrasah Aliyah Al-Hidayah Labuhan Batu Selatan, North Sumatra”. Eureka Herba Indonesia, Vol. 2, no. 1, Mar. 2021, pp. 75-80, doi:10.37275/ehi.v2i1.16.