APA (7th ed.) Citation

Hollis, M., & Smith, S. (1991). Explaining and understanding international relations. Clarendon Press.

Chicago Style (17th ed.) Citation

Hollis, Martin, and Steve Smith. Explaining and Understanding International Relations. Oxford [England]: Clarendon Press, 1991.

MLA (9th ed.) Citation

Hollis, Martin, and Steve Smith. Explaining and Understanding International Relations. Clarendon Press, 1991.