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2. J. Callaghan (2007) The Labour Party and Foreign Policy: A History (London: Routledge).
3. M. Cowling (1971) The Impact of Labour 1920–1924: The Beginning of Modern British Politics (Cambridge: Cambridge University Press), p. 3.
4. R. S. Grayson (1997) Austen Chamberlain and the Commitment to Europe: British Foreign Policy, 1924–29 (London: Frank Cass).
5. R. Crowcroft (2008) ‘Maurice Cowling and the Writing of British Political History’, Contemporary British History, XXII, 279–286.