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Burreson, Penny Le Couteur and Jay. Napolean's Buttons, 17 Molecules That Changed History. New York, New York: Penguin Group Inc.
Centers for Disease Controll and Prevention. CDC. Feb 6, 2014. http://www.cdc.gov/tobacco/data_statistics/fact_sheets/economics/econ_facts/.
Charlton, Anne. Journal of the Royal Society of Medicine. Jun 2004. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1079499/ (accessed April 16, 2014).
Effects of Smoking on your Health. U.S. Department of Health & Human Services. http://betobaccofree.hhs.gov/health-effects/smoking-health/ (accessed April 16, 2014).
Erik Jensen, Erik Overgaurd. "Smoking Patterns, Knowledge of Tobacco-Related Health Effects, and Desires to Quit among 14- to 17-Year-Old Boarding School Pupils in Denmark, 1987-90." Tobacco Control (BMJ).
Growing Tobacco. American Cancer Society World Lung Foundation. http://www.tobaccoatlas.org/industry/growing_tobacco/text/ (accessed April 16, 2014).
Joseph DeFranza, Robert Wellman, Judith Savageau. "Does progression through the stages of physical addiction indicate increasing overall addiction to tobacco?" Psychopharmacology.
Secondhand Smoke Facts. University of Minnesota. http://www1.umn.edu/perio/tobacco/secondhandsmoke.html (accessed April 17, 2014).
The Growth of the Tobacco Trade. Independence Hall Association in Philadelphia. http://www.ushistory.org/us/2d.asp.
Tobacco. ikisan. http://www.ikisan.com/crop%20specific/eng/links/ap_tobaccoClimate%20And%20Soils.shtml (accessed April 22, 14).
Growing Tobacco. American Cancer Society World Lung Foundation. http://www.tobaccoatlas.org/industry/growing_tobacco/text/ (accessed April 16, 2014).
Google Images