Dwi Cahya, Nesya Kartika, and Ignatio Rika. “Association Between Physical Activity Level and Sleep Quality in the Elderly”. Journal of Urban Health Research 1, no. 1 (January 9, 2023): 47–55. Accessed May 25, 2024. https://ejournal.atmajaya.ac.id/index.php/juhr/article/view/3853.