CLEEF, E. V. (1970). Cities In Action. Pergamon Press.
Lua i Stíl Chicago (17ú heag.)CLEEF, Eugene Van. Cities In Action. Pergamon Press, 1970.
Lua MLA (8ú heag.)CLEEF, Eugene Van. Cities In Action. Pergamon Press, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.