"The question, though, is if people will popularly refer to the building as anything other than the Sears Tower," said Tim Samuelson, the city of Chicago's cultural historian. The Willis Tower? Chicagoans In Disbeliefდაარქივებული 2009-05-13 საიტზე Wayback Machine. Retrieved on July 19, 2009
upi.com
It's still popularly known as the Sears Tower and it's unclear how long that habit will last. UPI.com Retrieved on July 19, 2009
web.archive.org
"The question, though, is if people will popularly refer to the building as anything other than the Sears Tower," said Tim Samuelson, the city of Chicago's cultural historian. The Willis Tower? Chicagoans In Disbeliefდაარქივებული 2009-05-13 საიტზე Wayback Machine. Retrieved on July 19, 2009
