Heimildir

9.1 Núlltilgátur og gagntilgátur

Centers for Disease Control and Prevention. (án dags.). Physical activity facts. Sótt af http://www.cdc.gov/healthyschools/physicalactivity/facts.htm

National Institute of Mental Health. (án dags.). Publications about depression. Sótt af http://www.nimh.nih.gov/publicat/depression.cfm

9.5 Viðbótarupplýsingar og heildstæð dæmi um tilgátupróf

American Automobile Association. (án dags.). Sótt af www.aaa.com

American Library Association. (án dags.). Sótt af www.ala.org

Amit Schitai. (án dags.). Data.

Bureau of Labor Statistics. (án dags.). Occupational employment statistics. Sótt af http://www.bls.gov/oes/current/oes291111.htm

Centers for Disease Control and Prevention. (án dags.). Sótt af www.cdc.gov

De Anza College. (2006). Foothill-De Anza Community College District. Sótt af http://research.fhda.edu/factbook/DAdemofs/Fact_sheet_da_2006w.pdf

Federal Bureau of Investigation. (án dags.). Uniform crime reports and index of crime in Daviess in the state of Kentucky enforced by Daviess County from 1985 to 2005. Sótt af http://www.disastercenter.com/kentucky/crime/3868.htm

Gallup. (án dags.). Sótt af www.gallup.com

Johansen, C., Boice, Jr. J., McLaughlin, J., & Olsen, J. (7. febrúar 2001). Cellular telephones and cancer—a nationwide cohort study in Denmark. Journal of National Cancer Institute, 93(3), 203-207. Sótt af http://www.ncbi.nlm.nih.gov/pubmed/11158188

La Leche League International. (án dags.). Sótt af http://www.lalecheleague.org/Law/BAFeb01.html

Online Learning Consortium. (nóvember 2005). Growing by degrees: Online education in the United States, 2005. Newburyport, MA: Allen, I. E., & Seaman, J. Aðgengilegt á http://files.eric.ed.gov/fulltext/ED530062.pdf

Toastmasters International. (án dags.). Sótt af http://toastmasters.org/artisan/detail.asp?CategoryID=1&SubCategoryID=10&ArticleID=429&Page=1

U.S. Census Bureau. (án dags.). Language use. Sótt af https://www.census.gov/topics/population/language-use.html

U.S. Census Bureau. (án dags.). QuickFacts. Sótt af https://www.census.gov/quickfacts/table/PST045216/00

U.S. Department of Energy. (án dags.). Sótt af http://energy.gov

Weather Underground. (án dags.). Sótt af www.wunderground.com