Cita APA

Shaffer, J. B. P., & Galinsky, M. D. (1989). Models of group therapy (2nd. ed.). Prentice Hall.

Chicago Edition Citation

Shaffer, John B. P., i M. David Galinsky. Models of Group Therapy. 2nd. ed. New Jersy: Prentice Hall, 1989.

Cita MLA

Shaffer, John B. P., i M. David Galinsky. Models of Group Therapy. 2nd. ed. Prentice Hall, 1989.