Παραπομπή σε μορφή APA (7η εκδ.)

Wallerstein, I. America and the world: The Twin Towers as metaphor / Immanuel Wallerstein. Understanding September 11.(2002).

Παραπομπή σε μορφή Chicago (17η εκδ.)

Wallerstein, Immanuel. "America and the World: The Twin Towers as Metaphor / Immanuel Wallerstein." Understanding September 11.(2002) .

Παραπομπή σε μορφή MLA (8th εκδ.)

Wallerstein, Immanuel. "America and the World: The Twin Towers as Metaphor / Immanuel Wallerstein." Understanding September 11.(2002), .