217231 Ashworth, G. (1973). Encyclopedia of planning. London : Barrie and Jenkins.
Lua i Stíl Chicago (17ú heag.)217231 Ashworth, Graham. Encyclopedia of Planning. London : Barrie and Jenkins, 1973.
Lua MLA (9ú heag.)217231 Ashworth, Graham. Encyclopedia of Planning. London : Barrie and Jenkins, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.