Ahmad Nordin N, Muhammad K, Mohamed Noor M, Manizira K. Leny Annan. Effect of Piper Betle extract hand sanitizer in reducing microbes on hands by using Fingertips Touch Plate Method. MARI [Internet]. 2021 May 24 [cited 2024 Jul. 18];2(2):226–233. Available from: https://penerbit.uthm.edu.my/periodicals/index.php/mari/article/view/2014