Sridith, Kitichatate. “A New Species Record of Argostemma (Rubiaceae) for Thailand”. Thai Forest Bulletin (Botany), no. 37 (November 26, 2014): 140–143. Accessed August 19, 2022. https://li01.tci-thaijo.org/index.php/ThaiForestBulletin/article/view/24344.