Lua APA (7ú heag.)

Asimov, I. (2016). Prelude to foundation. Harper Collins.

Lua i Stíl Chicago (17ú heag.)

Asimov, Isaac. Prelude to Foundation. London: Harper Collins, 2016.

Lua MLA (9ú heag.)

Asimov, Isaac. Prelude to Foundation. Harper Collins, 2016.

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