Isbagio, Harry. “Use of Anti-Citrullinated Peptide (Anti–CCP) Antibodies in Distinguishing Patients With Systemic Lupus Erythematosus and Rheumatoid Arthritis”. Medical Journal of Indonesia 13, no. 4 (November 1, 2004): 227-31. Accessed March 29, 2024. http://mji.ui.ac.id/journal/index.php/mji/article/view/157.