Suwanphakdee, C., Khammonkol, K. . ., Middleton, D., & Suddee, S. (2021). Thunbergia amphaii (Acanthaceae) a new species from Thailand. Thai Forest Bulletin (Botany), 49(1), 57–62. https://doi.org/10.20531/tfb.2021.49.1.06