Cita APA (7a ed.)

Ropers, R. H. (1988). The invisible homeless: A new urban ecology. Insight Books.

Cita Chicago Style (17a ed.)

Ropers, Richard H. The Invisible Homeless: A New Urban Ecology. New York, NY: Insight Books, 1988.

Cita MLA (8a ed.)

Ropers, Richard H. The Invisible Homeless: A New Urban Ecology. Insight Books, 1988.