Referencias

1. Animals, a visual encyclopedia. Smithsonian. 2012. Pp. 62, 63.

2. Alderton, David. The encyclopedia of animals. Chartwell books, Inc., 2009. Pp. 107, 109-111.

3. Woolverton et al. Arctic Tale. National Geographic, 2007.

4. Sale, Richard. The Arctic. The complete story. Frances Lincoln Limited Publishers, 2008. Pp. 443-445.

5. Gehrt, Cypher, et.al. Urban Carnivores: Ecology, Conflict, and Conservation. JHU Press,2010.

6. http://www.iucnredlist.org/details/23062/0

7. http://news.bbc.co.uk/cbbcnews/hi/find_out/guides/animals/fox_hunting/newsid
_1717000/1717812.stm

8. http://en.wikipedia.org/wiki/Fox

9. http://www.worldwildlife.org/species/arctic-fox

10. http://animaldiversity.org/