Theodore Roosevelt, Theodore Roosevelt: An Autobiography (BiblioBazaar, 2007; ISBN1-4346-0319-9), p. 66 (Here at Google Books); an earlier edition also at Project Gutenberg.
Theodore Roosevelt, "Reform through Social Work: Some Forces that Tell for Decency in New York City", McClure's Magazine, March 1901. Reprinted in Judith Mitchell Buddenbaum and Debra L. Mason, eds., Readings on Religion as News (Ames: Iowa State University Press, 1999; ISBN0-8138-2926-7), p. 187. Available online at Google Books (which inexplicably claims publication by Wiley-Blackwell).
Roosevelt (March 1901). Reform through Social Work. McClure's Magazine. pp. 252–254. Retrieved November 1, 2022.
Theodore Roosevelt, Theodore Roosevelt: An Autobiography (BiblioBazaar, 2007; ISBN1-4346-0319-9), p. 66 (Here at Google Books); an earlier edition also at Project Gutenberg.
"Jacob Riis Playground", New York City Department of Parks and Recreation, n.d. Retrieved August 13, 2009.
"Jacob Riis Triangle", New York City Department of Parks and Recreation, 2001. Retrieved August 13, 2009.
nypl.org
Francesca Pitaro, "Guide to the Jacob Riis Papers" (Manuscripts and Archives Division, New York Public Library, 1985; available as a PDF file hereArchived October 15, 2006, at the Wayback Machine).
nytimes.com
timesmachine.nytimes.com
"A day's weddings" (PDF), The New York Times June 2, 1900. Retrieved August 17, 2009.
Francesca Pitaro, "Guide to the Jacob Riis Papers" (Manuscripts and Archives Division, New York Public Library, 1985; available as a PDF file hereArchived October 15, 2006, at the Wayback Machine).