1. United States Department of Labor: Disability Resources.
http://www.dol.gov/dol/topic/disability/ada.htm
. Last modified 2015
2. United States Access Bureau: Section 508 Standards for Electronic and Information Technology.
https://www.access-board.gov/guidelines-and-standards/communications-and-it/about-the-section-508-standards/section-508-standards
. Accessed Jan 2016
3. United States Census Bureau: QuickFacts Beta.
http://www.census.gov/quickfacts/table/PST045214/00
. Accessed Jan 2016
4. WebAIM.org: Section 508 Checklist.
http://webaim.org/standards/508/checklist
. Accessed Jan 2016
5. United States Census Bureau: American Community Survey and Puerto Rico Community Survey 2013 Subject Definitions.
http://www.census.gov/acs/www/Downloads/data_documentation/SubjectDefinitions/2013_ACSSubjectDefinitions.pdf
. Accessed Jan 2016