GEORGE HERBERT WALKER BUSH
www.en.wikipedia.com
www.encarta.msn.com

BILL CLINTON
www.en.wikipedia.com
www.whitehouse.gov
www.bartleby.com
www.encarta.msn.com
My Life, biografia a opera di William Jefferson Clinton.

GEORGE W. BUSH
www.en.wikipedia.com
www.whitehouse.gov
www.bartleby.com

BARACK HUSSEIN OBAMA
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www.barackobama.com
www.corrieredellasera.it