Anggelia B, Elvina E, Nasution NL. Training For Making Handsanitizer From Betel Leaf Extract and Lime Oranges in Smp Negeri 2 Na Ix-X Sumberjo, Labuhanbatu Utara Regency. IJCS [Internet]. 2022 Feb. 28 [cited 2025 Sep. 10];2(1):143-8. Available from: https://ijcsnet.id/index.php/go/article/view/77