Ghada Younis , Abdulrahman, Hamodat Heba F, and Salim Ammar S. “Assessment of Periodontal Pathogens and Gingival Health Improvement After School-Based Educational Program Among Secondary School Students”. History of Medicine 9, no. 1 (February 28, 2023). Accessed September 15, 2025. http://www.historymedjournal.com/index.php/medicine/article/view/580.