Cita APA (7a ed.)

Hill, C., & Smith, M. (2005). International relations and the European Union. University Press.

Cita Chicago Style (17a ed.)

Hill, Christopher, y Michael Smith. International Relations and the European Union. Oxford [etc.]: University Press, 2005.

Cita MLA (9a ed.)

Hill, Christopher, y Michael Smith. International Relations and the European Union. University Press, 2005.