DEWI, N. W. E. P.; SAWITRI, A. A. S.; MULIAWAN, P. The effectiveness of WhatsApp video to increase knowledge of pneumonia early detection among mothers of children under five years. Public Health and Preventive Medicine Archive, [S. l.], v. 7, n. 1, p. 60–65, 2019. DOI: 10.53638/phpma.2019.v7.i1.p12. Disponível em: http://phpmarchive.org/index.php/phpma/article/view/104. Acesso em: 7 may. 2026.