Portes, A., Castells, M., & Benton, L. A. (1989). The Informal economy: Studies in advanced and less developed countries. Johns Hopkins University.
Cita Chicago Style (17a ed.)Portes, Alejandro, Manuel Castells, y Lauren A. Benton. The Informal Economy: Studies in Advanced and Less Developed Countries. Baltimore: Johns Hopkins University, 1989.
Cita MLA (8a ed.)Portes, Alejandro, et al. The Informal Economy: Studies in Advanced and Less Developed Countries. Johns Hopkins University, 1989.
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