APA (7th ed.) Citation

United States. White House Office. (2010). All the president's pens. United States. White House.

Chicago Style (17th ed.) Citation

United States. White House Office. All the President's Pens. Washington, D.C.: United States. White House, 2010.

MLA (9th ed.) Citation

United States. White House Office. All the President's Pens. United States. White House, 2010.

Warning: These citations may not always be 100% accurate.