Abdullah , Siti Nur Fathiha. “Kesan Proses Pengoksidaan Daripada Ekstrak Tumbuhan Rosel (Hibiscus Sabdariffa Var. Ukmr-2) Kering Di Bahagian Yang Berbeza”. Politeknik & Kolej Komuniti Journal of Engineering and Technology 5, no. 1 (November 30, 2020): 151–157. Accessed January 14, 2026. https://app.mypolycc.edu.my/journal/PMJET/article/view/288.