Damon, Allan L. (June 1974). "Presidential Expenses". American Heritage Magazine. Vol. 25, no. 4. Archived from the original on January 7, 2009. Retrieved February 14, 2012.
Damon, Allan L. (June 1974). "Presidential Expenses". American Heritage Magazine. Vol. 25, no. 4. Archived from the original on January 7, 2009. Retrieved February 14, 2012.