Heywood, A. (2016). Key Concepts in Politics and International Relations (2nd.). Palgrave.
Lua i Stíl Chicago (17ú heag.)Heywood, Andrew. Key Concepts in Politics and International Relations. 2nd. London: Palgrave, 2016.
Lua MLA (9ú heag.)Heywood, Andrew. Key Concepts in Politics and International Relations. 2nd. Palgrave, 2016.
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