Cita APA (7a ed.)

Portes, A., Castells, M., & Benton, L. A. (1991). The informal economy: Studies in advanced and less developed countries (2nd printing, pbk.). Johns Hopkins University Press.

Cita Chicago Style (17a ed.)

Portes, Alejandro, Manuel Castells, y Lauren A. Benton. The Informal Economy: Studies in Advanced and Less Developed Countries. 2nd printing, pbk. Baltimore [etc.]: Johns Hopkins University Press, 1991.

Cita MLA (9a ed.)

Portes, Alejandro, et al. The Informal Economy: Studies in Advanced and Less Developed Countries. 2nd printing, pbk. Johns Hopkins University Press, 1991.