Allegrini, Robert V. Chicago's Grand Hotels: the Palmer House Hilton, the Drake, and the Hilton Chicago. Arcadia Pub., 2005.

Garrido, Ric, et al. “Hilton Chicago and Its Stevens Hotel Scandalous History.” Loyalty Traveler, 16 July 2014, loyaltytraveler.boardingarea.com/2014/04/16/hilton-chicago-and-its-stevens-hotel-scandalous-history/.

“Hilton Chicago - A Brief History.” League of Women Voters, www.lwv.org/league-management/council-convention/hilton-chicago-brief-history.

“Hilton Chicago.” Historic Hotels of America, www.historichotels.org/hotels-resorts/hilton-chicago/history.php.

Holabird & Roche, Architects, www.thechicagoloop.org/arch.hroc.00000.html.

“Holabird & Roche.” WTTW Chicago, 16 Apr. 2018, interactive.wttw.com/loop/architects/holabird-roche.

“Holabird & Roche/Root.” Chicago Landmarks - Architect Details, webapps1.chicago.gov/landmarksweb/web/architectdetails.htm?arcId=9.

“Online Passport.” OpenAM (Login), journals-sagepub-com.turing.library.northwestern.edu/doi/pdf/10.1177/0309132508089096.

Solomon, Wendy E. “CHICAGO PUT THE ROAR IN THE ROARING '20S.” Themorningcall.com, 23 Dec. 2018, www.mcall.com/news/mc-xpm-1999-05-16-3251275-story.html.

Stevens, John Paul, and Supreme Court. “Contents.” Chicagology, chicagology.com/skyscrapers/skyscrapers041/.

Thomas, John C. “Chicago Architecture Tour: The Historic Hotels of South Michigan Avenue.” Owlcation, Owlcation, 13 June 2018, owlcation.com/humanities/Chicago-Architecture-Tour-The-Historic-Hotels-of-Michigan-Avenue.