1. American Ornithologists’ Union, 1998. Check-list of North American Birds, 7th ed. American Ornithologists’ Union, Washington, DC.
2. First nesting records of Worthen’s Sparrow Spizella wortheni for Nuevo León, México, with a habitat characterization of the nest and notes on ecology, voice, additional recent sightings and leg coloration;Behrstock;Cotinga,1997
3. BirdLife International, 2008. Spizella wortheni. In: IUCN 2008. 2008 IUCN Red List of Threatened Species. (11 November 2008).
4. Notes on the birds of southeastern Coahuila;Burleigh;Occas. Pa. Mus. Zool. Louisiana State Univ.,1942
5. New breeding localities of Worthen’s Sparrows in northeastern Mexico;Canales-del-Castillo;J. Field Ornithol.,2010