APA (7th ed.) Citation

Bellamy, R., Lacey, J., & Nicolaïdis, K. (2017). European boundaries in question? Routledge.

Chicago Style (17th ed.) Citation

Bellamy, R., J. Lacey, and K. Nicolaïdis. European Boundaries in Question? Routledge, 2017.

MLA (9th ed.) Citation

Bellamy, R., et al. European Boundaries in Question? Routledge, 2017.