United States. White House Office & Obama, B. (2012). President Obama speaks at the air force academy commencement ceremony. White House.
Chicago Style (17th ed.) CitationUnited States. White House Office and Barack Obama. President Obama Speaks at the Air Force Academy Commencement Ceremony. Washington DC: White House, 2012.
MLA (9th ed.) CitationUnited States. White House Office and Barack Obama. President Obama Speaks at the Air Force Academy Commencement Ceremony. White House, 2012.
Warning: These citations may not always be 100% accurate.