Cita APA (7th ed.)

Portes, A., Castells, M., & Benton, L. A. The informal economy. The Johns Hopkins University Press.

Cita Chicago (17th ed.)

Portes, Alejandro, Manuel Castells, i Lauren A. Benton. The Informal Economy. Maryland: The Johns Hopkins University Press.

Cita MLA (9th ed.)

Portes, Alejandro, et al. The Informal Economy. The Johns Hopkins University Press.