Krugman, Paul (October 15, 2011). "A Bit More About Cain". The New York Times. Archived from the original on September 6, 2017.. Paul Krugman. October 15, 2011
Bartlett, Bruce (October 11, 2011). "Inside the Cain Tax Plan". The New York Times=date=October 11, 2011. Archived from the original on February 27, 2017.
Krugman, Paul (October 15, 2011). "A Bit More About Cain". The New York Times. Archived from the original on September 6, 2017.. Paul Krugman. October 15, 2011
Bartlett, Bruce (October 11, 2011). "Inside the Cain Tax Plan". The New York Times=date=October 11, 2011. Archived from the original on February 27, 2017.