Ratnadewi, Diah. “Enhanced Production Level of Quinine in Cell Suspension Culture of Cinchona Ledgeriana Moens by Paclobutrazol”. BIOTROPIA - The Southeast Asian Journal of Tropical Biology 20, no. 1 (September 23, 2013). Accessed January 28, 2023. https://journal.biotrop.org/index.php/biotropia/article/view/291.