References

Big Site of Amazing Facts; What Gives Your Skin Its Colour?
http://www.bigsiteofamazingfacts.com/what-gives-your-skin-its-color

Costin, G. & Hearing, V. 2007. Human skin pigmentation: melanocytes modulate skin color in response to stress. The FASEB Journal. 21: 976-994.

Jablonski, N. 2004. The evolution of human skin and skin color. Annual Review of Anthropology.        33:585-623

Jablonski, N. & Chaplin, B. 2000. The evolution of human skin coloration. Journal of Human Evolution. 39: 57-106.

Kids Health; Your Skin
http://kidshealth.org/kid/htbw/skin.html#

Medical News Today; What is Vitamin D?
http://www.medicalnewstoday.com/articles/161618.php

News Medical; Melanin- What is Melanin?
http://www.news-medical.net/health/Melanin-What-is-Melanin.aspx

Relethford, J.H. 2002. Apportionment of global human genetic diversity based on craneometrics and skin color. Am. J. Phys. Anthropol. 118, 393−398.

Smithsonian National Museum of Natural History; Skin Colour
http://humanorigins.si.edu/evidence/genetics/skin-color/modern-human-diversity-skin-color