SIREGAR, R.; GULTOM, R. EFFECT OF LAUGHTER THERAPY ON DEPRESSION LEVEL IN ELDERLY IN A NURSING HOME, NORTH SUMATRA, INDONESIA. Belitung Nursing Journal, [S. l.], v. 5, n. 6, p. 246–250, 2019. DOI: 10.33546/bnj.830. Disponível em: https://www.belitungraya.org/BRP/index.php/bnj/article/view/830. Acesso em: 29 mar. 2024.