APA (7th ed.) Citation

Griffiths, M., Roach, S. C., & Solomon, S. M. (2009). Fifty key thinkers in international relations. Routledge.

Chicago Style (17th ed.) Citation

Griffiths, Martin, Steven C. Roach, and Scott M. Solomon. Fifty Key Thinkers in International Relations. London: Routledge, 2009.

MLA (9th ed.) Citation

Griffiths, Martin, et al. Fifty Key Thinkers in International Relations. Routledge, 2009.