APA (7th ed.) Citation

Griffiths & O'Callaghan. (2002). International relations: The key concepts. Routledge.

Chicago Style (17th ed.) Citation

Griffiths and O'Callaghan. International Relations: The Key Concepts. London: Routledge, 2002.

MLA (8th ed.) Citation

Griffiths and O'Callaghan. International Relations: The Key Concepts. Routledge, 2002.

Warning: These citations may not always be 100% accurate.