1.
Siregar R, Gultom R. EFFECT OF LAUGHTER THERAPY ON DEPRESSION LEVEL IN ELDERLY IN A NURSING HOME, NORTH SUMATRA, INDONESIA. Belitung Nurs J [Internet]. 2019 Dec. 21 [cited 2024 Apr. 20];5(6):246-50. Available from: https://www.belitungraya.org/BRP/index.php/bnj/article/view/830