Hill, C. J., Smith, M., & Vanhoonacker, S. (2023). International relations and the European Union (Fourth edition.). Oxford University Press.

Hill, Christopher J., Michael Smith, and Sophie Vanhoonacker. International Relations and the European Union. Fourth edition. Oxford: Oxford University Press, 2023.

Hill, Christopher J., et al. International Relations and the European Union. Fourth edition. Oxford University Press, 2023.