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Goodhart, D. (2017) ‘“Anywheres and Somewheres” [in] The road to somewhere: the new tribes shaping British politics’, in The road to somewhere: the new tribes shaping British politics. London: Penguin Books. Available at: https://contentstore.cla.co.uk/secure/link?id=cb42de27-4214-e911-80cd-005056af4099.
Kellstedt, P. M. and Whitten, G. D. (2013) ‘Chapter 2, sections 2.6 and 2.7 [in] The fundamentals of political science research’, in The fundamentals of political science research. 2nd ed. Cambridge: Cambridge University Press. Available at: https://contentstore.cla.co.uk/secure/link?id=c3c1fba4-4714-e911-80cd-005056af4099.
Lake, D. A. and Powell, R. (1999) ‘“International Relations: A Strategic-Choice Approach” [in] Strategic choice and international relations’, in Strategic choice and international relations. Princeton, N.J.: Princeton University Press. Available at: https://contentstore.cla.co.uk/secure/link?id=45d76bd5-4014-e911-80cd-005056af4099.
University of Exeter (2018) Politics & International Relations - LibGuides at University of Exeter. Available at: https://libguides.exeter.ac.uk/politics.