Portes, A., Castells, M., & Benton, L. A. The informal economy. The Johns Hopkins University Press.
Chicago-čujuhus (17. p.)Portes, Alejandro, Manuel Castells, juo Lauren A. Benton. The Informal Economy. Maryland: The Johns Hopkins University Press.
MLA-čujuhus (9. p.)Portes, Alejandro, et al. The Informal Economy. The Johns Hopkins University Press.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.