I am assuming you used the "Insert Citation" button in Word 2007 to add your
citations. Right next to it is a "Bibliography" button. Click it and either
pick one of the items in the gallery or choose "Insert Bibliography" at the
bottom. This last option will give you a bibliography without any heading.
Note that both cited and uncited references are put in your bibliography. If
you don't want uncited references to show up, you can use the "Master
Sources" button to get to a list of all the sources in your document (right
column). You can select an uncited item (no v next to it) and use Delete to
remove it.
Yves