In what book is the quote "Change will not come if we wait for some other person or some other time"?

This quotation is not from a book, but from a speech of Barack Obama, which he made when he campaigning to be president the first time.  The speech was given on what is known as "Super Tuesday," which is the Tuesday on which several states make their choice of a presidential nominee.  This was on February 8, 2008 in Chicago, Illinois, which was home ground for Obama.  He makes reference in this speech to the challenges that the United States faces, poverty, injustice, and war, to name a few, and promises a change if he is elected.  He discusses his work as a community organizer, trying to make changes, little by little, and then says that "we," meaning himself and all Americans, are the people who must effectuate the changes that the country needs.  He ends with the rousing slogan, "Yes we can."  It's a powerful speech, probably one of his best. I have included the link for it below.