Sheehan, M. (1996). The balance of power: History and theory. Routledge.
Cita Chicago (17th ed.)Sheehan, Michael. The Balance of Power: History and Theory. Londres: Routledge, 1996.
Cita MLA (9th ed.)Sheehan, Michael. The Balance of Power: History and Theory. Routledge, 1996.
Atenció: Aquestes cites poden no estar 100% correctes.