Donny P Lubis, Gontar A Siregar & Taufik Sungkar. “COMPARISON OF TOTAL ANTIOXIDANT SERUM LEVEL IN POSITIVE AND NEGATIVE H. PYLORI GASTRITIS PATIENTS”. International Journal of Research Science and Management 6, no. 10 (October 30, 2019): 7–11. Accessed April 4, 2025. http://ijrsm.com/index.php/journal-ijrsm/article/view/249.