Cita APA (7a ed.)

Bull, H., & Watson, A. (1992). The expansion of international society. Clarendon Press.

Cita Chicago Style (17a ed.)

Bull, Hedley, y Adam Watson. The Expansion of International Society. Oxford: Clarendon Press, 1992.

Cita MLA (8a ed.)

Bull, Hedley, y Adam Watson. The Expansion of International Society. Clarendon Press, 1992.