Fitriani Sammulia, Suci, Aprilya Sri Rachmayanti, and Joel Lam Parulian Tampubolon. 2023. “Optimization of HPMC As Gelling Agent in Gel Formula of Etanol Extract of Bangun-Bangun Leaves (Plectranthus Amboinicus (Lour) Spreng)”. Jurnal EduHealth 14 (01):160-66. https://ejournal.seaninstitute.or.id/index.php/healt/article/view/1446.