Damodaran, A. (2014), “The Data Page,” Accessed March 24, 2014.
URL http://pages.stern.nyu.edu/~adamodar/New_Home_Page/data.html
Federal Reserve Bank of St. Louis (2012), “Economic Research,” Accessed November 7, 2012.
URL http://research.stlouisfed.org/
Kamel, T. (2014a), “Data Sources,” Accessed March 14, 2014.
URL http://www.quandl.com/resources/data-sources/
Kamel, T. (2014b), “Using the Quandl API,” Accessed March 14, 2014.
URL http://www.quandl.com/help/api/
Kamel, T. (2014c), “Using the Quandl API,” Accessed March 14, 2014.
URL http://www.quandl.com/resources/useful-lists/