Beier, G. (1975). The task ahead for the cities of the developing countries. World Bank.
Lua i Stíl Chicago (17ú heag.)Beier, George. The Task Ahead for the Cities of the Developing Countries. Washington: World Bank, 1975.
Lua MLA (9ú heag.)Beier, George. The Task Ahead for the Cities of the Developing Countries. World Bank, 1975.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.