Cita APA (7a ed.)

Griffiths, M., & O'Callaghan, T. (2002). International relations: The key concepts. Routledge.

Cita Chicago Style (17a ed.)

Griffiths, Martin, y Terry O'Callaghan. International Relations: The Key Concepts. London: Routledge, 2002.

Cita MLA (9a ed.)

Griffiths, Martin, y Terry O'Callaghan. International Relations: The Key Concepts. Routledge, 2002.