Sutcliffe, A. (1984). Metropolis 1890-1940. Mansell.
Lua i Stíl Chicago (17ú heag.)Sutcliffe, Anthony. Metropolis 1890-1940. London: Mansell, 1984.
Lua MLA (8ú heag.)Sutcliffe, Anthony. Metropolis 1890-1940. Mansell, 1984.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.