Lua APA (7ú heag.)

Barker, R. (2018). International relations and policies. Clanrye International.

Lua i Stíl Chicago (17ú heag.)

Barker, Robert. International Relations and Policies. New York: Clanrye International, 2018.

Lua MLA (9ú heag.)

Barker, Robert. International Relations and Policies. Clanrye International, 2018.

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