Lua APA (7ú heag.)

(2011). Metropolitan areas in Europe.

Lua i Stíl Chicago (17ú heag.)

Metropolitan Areas in Europe. Bonn, 2011.

Lua MLA (8ú heag.)

Metropolitan Areas in Europe. 2011.

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