Sheperd, R. (2002). Structures of our time31 buildings that changed modern life2002. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Sheperd, Roger. Structures of Our Time31 Buildings That Changed Modern Life2002. McGraw-Hill, 2002.
Lua MLA (8ú heag.)Sheperd, Roger. Structures of Our Time31 Buildings That Changed Modern Life2002. McGraw-Hill, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.