por Watzlawick, Paul [autor] | Weakland, John H [autor] | Fisch, Richard, 1926- [autor] | Erickson, Milton H [prologuista] | Guéra Miralles, Alfredo [traductor] | Watzlawick, Paul. Change, principles of problem formation and problem resolution.
por Fisch, Richard, 1926- [autor] | Segal, Lynn [autor] | Weakland, John H [autor] | Iglesias, Juan Andrés [traductor] | Fisch, Richard, 1926-. Tactics of change.