Jobling, J.A. (2019). "Lewinia". Handbook of the Birds of the World Alive: Key to Scientific Names in Ornithology. Lynx Edicions. Retrieved 8 July 2019.
Jobling, J.A. (2019). "lewinii". Handbook of the Birds of the World Alive: Key to Scientific Names in Ornithology. Lynx Edicions. Retrieved 8 July 2019.