Andrew King, John Plunkett (2005). Victorian Print Media: A Reader (em inglês). [S.l.]: Oxford University Press. p. 50. ISBN0-19-927037-6. National Review (1855–64) one of the most prestigious quarterlies of mid-century]
google.com.br
books.google.com.br
Barrington, Mrs Russell (1914). Life of Walter Bagehot (em inglês). Londres; Nova Iorque: Longmans, Green and Company. p. 233