Grace, J., D. J. Anderson, C. Carboneras, D. A. Christie, F. Jutglar, E. F. J. Garcia, and G. M. Kirwan (2020). Masked Booby (Sula dactylatra), version 1.0. In Birds of the World (S. M. Billerman, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.masboo.01
Winkler, D. W., S. M. Billerman, and I.J. Lovette (2020). Boobies and Gannets (Sulidae), 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.sulida1.01
