APA (7th ed.) Citation

Christiansen, T., & Duke, S. (2013). The Maastricht Treaty: Second thoughts after 20 years. Routledge.

Chicago Style (17th ed.) Citation

Christiansen, Thomas, and Simon Duke. The Maastricht Treaty: Second Thoughts After 20 Years. London ; New York: Routledge, 2013.

MLA (9th ed.) Citation

Christiansen, Thomas, and Simon Duke. The Maastricht Treaty: Second Thoughts After 20 Years. Routledge, 2013.

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