Barr, R. (1995). Cities. Lucent Books.
Lua i Stíl Chicago (17ú heag.)Barr, Roger. Cities. San Diego, CA: Lucent Books, 1995.
Lua MLA (8ú heag.)Barr, Roger. Cities. Lucent Books, 1995.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.