Lua APA (7ú heag.)

Sowell, T. (2002). Controversial essays. Hoover Institution Press.

Lua i Stíl Chicago (17ú heag.)

Sowell, Thomas. Controversial Essays. Stanford, CA: Hoover Institution Press, 2002.

Lua MLA (9ú heag.)

Sowell, Thomas. Controversial Essays. Hoover Institution Press, 2002.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.