Arizmendi, M. d. C., C. I. Rodríguez-Flores, C. A. Soberanes-González, G. M. Kirwan, and T. S. Schulenberg (2020). Black-crested Coquette (Lophornis helenae), version 1.0. In Birds of the World (T. S. Schulenberg, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.blccoq1.01 retrieved 16 February 2022
Gutiérrez-Vannucchi, A. C. and X. Obregón- Apéstegui (2020). White-crested Coquette (Lophornis adorabilis), version 1.0. In Birds of the World (S. M. Billerman, B. K. Keeney, P. G. Rodewald, and T. S. Schulenberg, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.whccoq1.01 retrieved February 17, 2022