VANNISA RACHMATIKA, Siti; SUMARTI, Sri. Effectiveness of Health Communication via WhatsApp on Adolescents’ Knowledge Change Regarding Gastritis Risk. Impact : Multidisciplinary Journal, [S. l.], v. 1, n. 01, p. 26–33, 2025. Disponível em: https://journal.takaza.id/index.php/impact/article/view/134. Acesso em: 30 aug. 2025.