Cita APA (7a ed.)

Snow, D. A., & Anderson, L. (1993). Down on their luck: A study of homeless street people. University of California Press.

Cita Chicago Style (17a ed.)

Snow, David A., y Leon Anderson. Down on Their Luck: A Study of Homeless Street People. Berkeley [u.a.]: University of California Press, 1993.

Cita MLA (8a ed.)

Snow, David A., y Leon Anderson. Down on Their Luck: A Study of Homeless Street People. University of California Press, 1993.