Middleton, David J. “A new species of Wrightia (Apocynaceae: Apocynoideae) from Thailand”. Thai Forest Bulletin (Botany), no. 35 (December 8, 2014): 80–85. accessed April 3, 2025. https://li01.tci-thaijo.org/index.php/ThaiForestBulletin/article/view/24204.