APA (7th ed.) Citation

Diez, T., Bode, I., & Costa, A. F. d. (2011). Key concepts in international relations. SAGE Publications.

Chicago Style (17th ed.) Citation

Diez, Thomas, Ingvild Bode, and Aleksandra Fernandes da Costa. Key Concepts in International Relations. Los Angeles: SAGE Publications, 2011.

MLA (9th ed.) Citation

Diez, Thomas, et al. Key Concepts in International Relations. SAGE Publications, 2011.