Lubis, N. D. A., S. Amelia, H. Yulfi, M. Panggabean, and M. F. Rozi. “Evaluation of Water, Sanitation, and Hygiene, Behavioral Aspects, Household State for the Diarrhea Prevalence Among Students in the Valley of Sinabung Volcano, North Sumatera, Indonesia”. Open Access Macedonian Journal of Medical Sciences, vol. 9, no. E, Oct. 2021, pp. 1175-81, doi:10.3889/oamjms.2021.7404.