Wallerstein, I. America and the world: The Twin Towers as metaphor / Immanuel Wallerstein. Understanding September 11.(2002).
Cita Chicago (17th ed.)Wallerstein, Immanuel. "America and the World: The Twin Towers as Metaphor / Immanuel Wallerstein." Understanding September 11.(2002) .
Cita MLA (8th ed.)Wallerstein, Immanuel. "America and the World: The Twin Towers as Metaphor / Immanuel Wallerstein." Understanding September 11.(2002), .
Atenció: Aquestes cites poden no estar 100% correctes.