Think Quest Citations and References   Permissions   All images on this site are either proprietary (buttons, the horizontal rule, and header graphics) or from sites that grant permission to use image files.  All presidential portraits are from the White House web site (http://www.whitehouse.gov). Images of presidents used on the opening page are from the respective presidential libraries.  All other non-proprietary images on the opening page are from the Reagan Presidential library.   Franklin Roosevelt http://www.fdrlibrary.marist.edu/   John Kennedy http://www.cs.umb.edu/jfklibrary/index.htm   Lyndon Johnson http://www.lbj.lib.utexas.edu/   Ronald Reagan http://www.lbjlib.utexas.edu/reagan   References   Due to the vast number of sources used in the preparation of this site, all citations are provided by subject in the appropriate citations page.