Kacang panjang merupakan tumbuhan dari famili Fabaceae (suku polong-polongan). Nama ilmiah Vigna sinensis pertama kali dipublikasikan oleh botanis Gaetano Savi pada tahun 1844.
POWO (2024). "Plants of the World Online. Facilitated by the Royal Botanic Gardens, Kew. Published on the Internet; https://powo.science.kew.org/."
IPNI (2024). "International Plant Names Index. Published on the Internet http://www.ipni.org, The Royal Botanic Gardens, Kew, Harvard University Herbaria & Libraries, and Australian National Herbarium"
USDA - NRCS (2024). "United States Department of Agriculture - Natural Resources Conservation Service", Plant Profile.
