DeLillo, D. (1997). Underworld. Scribner.
Lua i Stíl Chicago (17ú heag.)DeLillo, Don. Underworld. New York, NY: Scribner, 1997.
Lua MLA (8ú heag.)DeLillo, Don. Underworld. Scribner, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.