6Hohhausen, D., M. Merriam and R. Nugent. The Volume of Consumer Instalment Credit, 1929-38 [EB/OL]. an NBER e-book from http://www.nber.org/books/holt40-2. 1940.
7UK' s Secretary of State for Trade and Industry. Fair, Clear and Competitive: The Consumer Credit Market in the 21st Century[R]. White Paper presented to UK' s Parliament, 2003.