Gartaula, Chanendra, and Dhan Bahadur Karki. 2013. “Optimization of Extraction of Anthocyanins from Roselle (Hibiscus Sabdariffa Var. Sabdariffa) in Aqueous Medium”. Journal of Food Science and Technology Nepal 6 (June):69-72. https://doi.org/10.3126/jfstn.v6i0.8263.