“Jacob Riis.” New World Encyclopedia. Accessed at: https://www.newworldencyclopedia.org/entry/Jacob_Riis. 

“Jacob Riis.” Theodore Roosevelt Center at Dickinson State University. Accessed at: https://www.theodorerooseveltcenter.org/Learn-About-TR/TR-Encyclopedia/Culture-and-Society/Jacob-Riis.

“Jacob Riis: Revealing “How the Other Half Lives.” Library of Congress. Accessed Nov. 21, 2022 at: https://www.loc.gov/exhibits/jacob-riis/ally.html.  

Riis, Jacob. How the Other Half Lives: Studies Among the Tenements of New York. New York: Charles Scribner’s Sons, 1907.

Riis, Jacob. Is There a Santa Claus? New York: The Macmillan Company, 1922.

Riis, Jacob. The Making of an American. New York: The Macmillan Company, 1901.