Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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