Cita APA (7a ed.)

Bull, H., & Watson, A. (1985). The Expansion of international society. Clarendon.

Cita Chicago Style (17a ed.)

Bull, Hedley, y Adam Watson. The Expansion of International Society. Oxford: Clarendon, 1985.

Cita MLA (9a ed.)

Bull, Hedley, y Adam Watson. The Expansion of International Society. Clarendon, 1985.