Perry, G. (2007). Informality: Exit and exclusion. World Bank.
Lua i Stíl Chicago (17ú heag.)Perry, Guillermo. Informality: Exit and Exclusion. Washington, D.C.: World Bank, 2007.
Lua MLA (9ú heag.)Perry, Guillermo. Informality: Exit and Exclusion. World Bank, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.