Changes
/* Overviews */
* McGerr, Michael. ''A Fierce Discontent: The Rise and Fall of the Progressive Movement in America, 1870-1920'' (2003)
*Mowry, George. ''The Era of Theodore Roosevelt and the Birth of Modern America, 1900-1912.'' (1954) general survey of era
* [[Burl Noggle|Noggle, Burl]]. "The Twenties: A New Historiographical Frontier," ''The Journal of American History,'' Vol. 53, No. 2. (Sep., 1966), pp. 299-314. [http://links.jstor.org/sici?sici=0021-8723%28196609%2953%3A2%3C299%3ATTANHF%3E2.0.CO%3B2-Y in JSTOR]
* Perry, Elisabeth Israels and Karen Manners Smith, eds. ''The Gilded Age & Progressive Era: A Student Companion'' (2006)
* Piott, Steven. ''American Reformers 1870-1920'' (2006). 240 pp. biographies of 12 leaders [http://www.h-net.msu.edu/reviews/showrev.php?id=24927 online review]
