- Upton Sinclair. The Jungle. New York: Barnes and Noble Classics, 2005.
- Upton Sinclair. The Jungle: Norton Critical Edition. New York: W.W. Norton & Company, 2003.
- Anthony Arthur. Radical Innocent: Upton Sinclair. New York: Random House, 2006.
-
"American Advertising: A Brief History." 2010-04-20. http://historymatters.gmu.edu/mse/ads/amadv.html.
-
Donald L. Miller. "Industrial Supremacy: 1865-1906." 2010-04-20. http://www.learner.org/biographyofamerica/prog14/transcript/page04.html.
-
Donna M. Campbell. "Realism in American Literature, 1860-1890." 2010-03-21. 2010-04-20. http://www.wsu.edu/~campbelld/amlit/realism.htm.
-
G. Stolyarov II. "Immigration from 1870 to 1920: Nativist Xenophobia and Persecution of Immigrants." 2007-06-05. 2010-04-20. http://www.associatedcontent.com/article/268943/immigration_from_1870_to_1920_nativist_pg2.html?cat=37.
-
"Says Big Five Runs Harvester Trust; Beef, Sugar, Steel and Oil Trusts and the National City Bank Declares F.J. Lowe." The New York Times. 1912-01-18. 2010-04-24. http://query.nytimes.com/gst/abstract.html?res=9902E6D61E31E233A2575BC1A9679C946396D6CF.