Where is the references section located?

I can't find the references for these resoruces.

Vitale S.,  Cotch M. F., Sperduto R. D. (2010). Prevalence of Visual
Impairment in the United States. Journal of the American Medical
Association, Vol 295, No. 18, Retrieved from
http://jama.jamanetwork.com/article.aspx?articleid=202836

McLeish Eve, A Study of the Effect of Letter (2007). Spacing on the Reading
Speed of Young Readers with Low Vision, British Journal of Visual
Impairment. 25:133, Retrieved from http://jvi.sagepub.com/content/25/2/133,
DOI: 10.1177/0264619607075995