Penurunan Tingkat Depresi Pada Lanjut Usia Melalui Terapi Tertawa. Jurnal Bakti Dirgantara, [S. l.], v. 2, n. 1, p. 20–26, 2025. DOI: 10.35968/kg31fn70. Disponível em: https://jurnallppm.unsurya.ac.id/index.php/jbd/article/view/170.. Acesso em: 17 aug. 2025.