Rajagukguk, Marlina. “The Relationship of Sleep Quality With Severity Level Acne Vulgaris in Students Aged 17-21 Years Faculty of Dentistry Prima Indonesia University”. Journal of Community Health Provision 4, no. 1 (September 25, 2024): 18-27. Accessed December 8, 2025. https://psppjournals.org/index.php/jchp/article/view/362.