“FORMULATION OF RED BETEL LEAF EXTRACT SERUM (Piper Crocatum Ruiz & Pav.) AS ANTIOXIDANT”. Journal of Pharmaceutical and Sciences 5, no. 1 (June 30, 2022): 120–127. Accessed October 22, 2026. https://journal-jps.com/new/index.php/jps/article/view/2065.