Cita APA (7a ed.)

Duncan, C. M., & Coles, R. (1999). Worlds apart: Why poverty persists in rural America. Yale University Press.

Cita Chicago Style (17a ed.)

Duncan, Cynthia M., y Robert Coles. Worlds Apart: Why Poverty Persists in Rural America. New Haven: Yale University Press, 1999.

Cita MLA (8a ed.)

Duncan, Cynthia M., y Robert Coles. Worlds Apart: Why Poverty Persists in Rural America. Yale University Press, 1999.