Cita APA (7th ed.)

Watzlawick, P., & weakland, J. H. (1974). Change: Principles of problem formation and problem resolution (ed.). W. W. Norton & company Inc..

Cita Chicago (17th ed.)

Watzlawick, Paul, i John H. weakland. Change: Principles of Problem Formation and Problem Resolution. ed. New York: W. W. Norton & company Inc., 1974.

Cita MLA (9th ed.)

Watzlawick, Paul, i John H. weakland. Change: Principles of Problem Formation and Problem Resolution. ed. W. W. Norton & company Inc., 1974.