(2002). The progressive era [Television series episode]. In America in the 20th Century. New York, NY: Films for the Humanities & Sciences. Retrieved from http://digital.films.com/OnDemandEmbed.aspx?Token=36215&aid=18596&Plt=FOD&loid=0&w=640&h=480&ref= Riis, J. (1914). How the other half lives: Studies among the tenements of New York New York: Charles Schribner’s Sons. Retrieved from http://books.google.com/books?id=3cFIAAAAYAAJ&dq=jacob%20riis%20how%20the%20other%20half%20lives&pg=PR3#v=onepage&q=jacob%20riis%20how%20the%20other%20half%20lives&f=false Sinclair, U. (1905). Chapter nine. The Jungle. Retrieved from http://historymatters.gmu.edu/d/5727 Steffens, L. (1904). The […]