widiastuti rina. Formulation and Physical Stability Test of Peel-Off Gel Mask Ethanol Extract of Avocado Leaf (Persea americana Mill) with PVA-HPMC Matrix. BSM [Internet]. 2019Sep.1 [cited 2024Sep.20];4:14-8. Available from: https://jurnal.poltekkes-bsi.ac.id/index.php/bsm/article/view/68