Reference
S, Whitney (2002). Tundra. Retrieved from http://www.blueplanetbiomes.org/tundra.htm.
C, Maria; S, Max; S, Tye; T, Emma; T, Travis (2000-2005). Tundra Animals. Retrieved from http://www.blueplanetbiomes.org/tundra_animal_page.htm
Alaska Kids (2013). Ermine. Retrieved from http://www.alaskakids.org/index.cfm?section=Cool-Critters&page=Featured-Critters&cat=Small-Mammals&viewpost=2&ContentId=2617
G, Loren; P, Ben; T, Eliot; T, Micah (2000). Tundra Plants. Retrieved from http://www.blueplanetbiomes.org/tundra_plant_page.htm
Ducks Unlimited. Harlequin Duck. Retrieved from http://www.ducks.org/hunting/waterfowl-id/harlequin-duck
University of California (2013). Museum of Paleontology. Retrieved from http://www.ucmp.berkeley.edu/
National Geographic Publishing (1996-2013). National Geographic. Retrieved from http://www.nationalgeographic.com/
Marietta College (2013). The Tundra Biome. Retrieved from http://www.marietta.edu/~biol/biomes/tundra.htm
National Science Teacher's Association (2004). World Biomes. Retrieved from http://www.worldbiomes.com/biomes_tundra.htm
Zach and James (n.d). The Tundra. Retrieved from http://www.livebinders.com/play/play?id=186615.