Thaib, M. R. “Effects of Subarachnoid Clonidine Spinal Anaesthesia With Hyperbaric Bupivacain”. Medical Journal of Indonesia 3, no. 1 (January 1, 1994): 48–53. Accessed May 9, 2025. http://mji.ui.ac.id/journal/index.php/mji/article/view/942.