Geiger, T. (1988). The future of the international system: The United States and the world. Unwin Hyman.
Cita Chicago (17th ed.)Geiger, Theodore. The Future of the International System: The United States and the World. Boston: Unwin Hyman, 1988.
Cita MLA (9th ed.)Geiger, Theodore. The Future of the International System: The United States and the World. Unwin Hyman, 1988.
Atenció: Aquestes cites poden no estar 100% correctes.