Clement, P. (2019). Trumpeter Finch (Bucanetes githagineus). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive.
Lynx Edicions, Barcelona. (retrieved from
https://www.hbw.com/node/61379 on 25 February 2019).