Lincoln's Gettysburg Address was the address Lincoln gave at Gettysburg

Perhaps today, on the 150th anniversary of the Gettysburg Address, it is worth remembering that Lincoln's Gettysburg Address is the address Abraham Lincoln gave at Gettysburg. It is the words he spoke on that occasion. The drafts made in preparation of the Gettysburg Address are not the Gettysburg Address. In the Gettysburg address---the actual address, the words Lincoln spoke---the Great Emancipator referred to the United States as "this nation, under God." Period. End of story.

http://www.firstthings.com/article/2010/07/god-and-gettysburg