Greif G. &. E. E., . (1997). Group Work with Populations at Risk. : Oxford University press.
Greif G.L & Ephross,P.H Ed, . 1997. Group Work with Populations at Risk. : Oxford University press.
Greif G.L & Ephross,P.H Ed, . Group Work with Populations at Risk. : Oxford University press. 1997.