Perry, G. (2007). Informality: Exit and exclusion. World Bank.
Chicago-čujuhus (17. p.)Perry, Guillermo. Informality: Exit and Exclusion. Washington, D.C.: World Bank, 2007.
MLA-čujuhus (9. p.)Perry, Guillermo. Informality: Exit and Exclusion. World Bank, 2007.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.