del Hoyo, J., N. Collar, and G. M. Kirwan (2020). Indochinese Roller (Coracias affinis), version 1.0. In Birds of the World (J. del Hoyo, A. Elliott, J. Sargatal, D. A. Christie, and E. de Juana, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.indrol3.01