Frequency of Tahajjud Prayer and Its Impact on Sleep Quality Among Elderly People in Karang Werda, Jember Regency. Jurnal Penelitian Sekolah Tinggi Ilmu Kesehatan Nahdlatul Ulama Tuban, [S. l.], v. 7, n. 1, 2025. DOI: 10.47710/jp.v7i1.693. Disponível em: https://ejournal.iiknutuban.ac.id/index.php/jp/article/view/693. Acesso em: 11 sep. 2025.