Cita APA (7a ed.)

Knodt, M., & Princen, S. (2003). Understanding the European Union's external relations. Routledge.

Cita Chicago Style (17a ed.)

Knodt, Michèle, y Sebastiaan Princen. Understanding the European Union's External Relations. London [etc.]: Routledge, 2003.

Cita MLA (9a ed.)

Knodt, Michèle, y Sebastiaan Princen. Understanding the European Union's External Relations. Routledge, 2003.