Cita APA (7a ed.)

Greif, G. L., & Ephross, P. H. (2011). Group work with populations at risk (3rd ed.). Oxford University Press.

Cita Chicago Style (17a ed.)

Greif, Geoffrey L., y Paul H. Ephross. Group Work with Populations at Risk. 3rd ed. Oxford [etc.]: Oxford University Press, 2011.

Cita MLA (9a ed.)

Greif, Geoffrey L., y Paul H. Ephross. Group Work with Populations at Risk. 3rd ed. Oxford University Press, 2011.