Puglisi, Carmen, and David J. Middleton. “A Revision of Middletonia (Gesneriaceae) in Thailand”. Thai Forest Bulletin (Botany) 45, no. 1 (September 11, 2017): 35–41. Accessed April 20, 2024. https://li01.tci-thaijo.org/index.php/ThaiForestBulletin/article/view/86483.