Willughby, Francis (1678). Ray, John (ed.). The Ornithology of Francis Willughby of Middleton in the County of Warwick. London: John Martyn. p. 199; Plate 38.
Levaillant, François (1807). "Supplément aux Differents Genres D'Oiseaux Décrit Dans Les Deaux Premiers Volumes". Histoire Naturelle des Promerops, et des Guêpiers : Faisant Suite à Celle des Oiseaux de Paradis. Paris: Chez Denné le Jeune. p. 44, Plate F.
Clements, J. F., T. S. Schulenberg, M. J. Iliff, S. M. Billerman, T. A. Fredericks, J. A. Gerbracht, D. Lepage, B. L. Sullivan, and C. L. Wood. 2021. The eBird/Clements checklist of Birds of the World: v2021. Downloaded from https://www.birds.cornell.edu/clementschecklist/download/ Retrieved August 25, 2021
doi.org
Rasmussen, P. C. and N. Collar (2020). Spot-backed Puffbird (Nystalus maculatus), 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.spbpuf1.01 retrieved November 2, 2021
Remsen, J. V., Jr., J. I. Areta, E. Bonaccorso, S. Claramunt, A. Jaramillo, D. F. Lane, J. F. Pacheco, M. B. Robbins, F. G. Stiles, and K. J. Zimmer. Version 24 August 2021. A classification of the bird species of South America. American Ornithological Society. https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm retrieved August 24, 2021