Hannum, Lili Faridah, and Prima Minerva. 2024. “Formulation And Testing Of Flavonoid And Vitamin C Levels Of Clay Mask Of Chinese Bidara Leaf Extract (Ziziphus Mauritiana Lam) For Aging Skin Care”. Jurnal EduHealth 15 (03):232-37. https://ejournal.seaninstitute.or.id/index.php/healt/article/view/4756.