APA (7e ed.) Bronvermelding

Greif, G. L., & Ephross, P. H. (1997). Group work with populations at risk. Oxford University Press.

Chicago (17e ed.) Bronvermelding

Greif, Geoffrey L., en Paul H. Ephross. Group Work with Populations at Risk. New York: Oxford University Press, 1997.

MLA (9e ed.) Bronvermelding

Greif, Geoffrey L., en Paul H. Ephross. Group Work with Populations at Risk. Oxford University Press, 1997.