CLARK, D. (1996). Urban World Global City. Routledge.
Lua i Stíl Chicago (17ú heag.)CLARK, David. Urban World Global City. Routledge, 1996.
Lua MLA (8ú heag.)CLARK, David. Urban World Global City. Routledge, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.