- ↑ 1.0 1.1 (1996) , database, NODC Taxonomic Code
- ↑ Dickinson, Edward C., ed. (2003) , The Howard and Moore Complete Checklist of the Birds of the World, 3rd edition
- ↑ Browning, M. Ralph, and Richard C. Banks (1990) The identity of Pennant's "Wapacuthu Owl" and the subspecific name of the population of Bubo virginianus from West Hudson Bay, The Journal of Raptor Research, vol. 24, no. 4
- ↑ Banks, Richard C., and M. Ralph Browning (1995) Comments on the status of revived old names for some North American birds, The Auk, vol. 112, no. 3
- ↑ Banks, R. C., R. W. McDiarmid, A. L. Gardner, and W. C. Starnes (2003) , Checklist of Vertebrates of the United States, the U.S. Territories, and Canada
- ↑ 6.0 6.1 (2005) , website, Zoonomen - Zoological Nomenclature Resource, 2005.08.07
- ↑ Banks, R. C., R. W. McDiarmid, and A. L. Gardner (1987) Checklist of Vertebrates of the United States, the U.S. Territories, and Canada, Resource Publication, no. 166
- ↑ 8.0 8.1 Banks, Richard C., C. Cicero, J. L. Dunn, A. W. Kratter, P. C. Rasmussen, J. V. Remsen, Jr., et al. (2003) Forty-fourth supplement to the American Ornithologists' Union Check-list of North American Birds, The Auk, vol. 120, no. 3
- ↑ 9.0 9.1 Bisby F.A., Roskov Y.R., Orrell T.M., Nicolson D., Paglinawan L.E., Bailly N., Kirk P.M., Bourgoin T., Baillargeon G., Ouvrard D. (ed.) (2011). "Species 2000 & ITIS Catalogue of Life: 2011 Annual Checklist". Species 2000: Reading, UK. Ginkuhà 24 Septyembre 2012.CS1 maint: multiple names: authors list (link) CS1 maint: extra text: authors list (link)
- ↑ ITIS: The Integrated Taxonomic Information System. Orrell T. (custodian), 26 Abril 2011