Henderson, J. V. How urban concentration affects economic growth. World Bank.
Lua i Stíl Chicago (17ú heag.)Henderson, J. Vernon. How Urban Concentration Affects Economic Growth. Washington, DC: World Bank.
Lua MLA (9ú heag.)Henderson, J. Vernon. How Urban Concentration Affects Economic Growth. World Bank.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.