Watzlawick, P., & weakland, J. H. (1974). Change: Principles of problem formation and problem resolution (ed.). W. W. Norton & company Inc..
Lua i Stíl Chicago (17ú heag.)Watzlawick, Paul, agus John H. weakland. Change: Principles of Problem Formation and Problem Resolution. ed. New York: W. W. Norton & company Inc., 1974.
Lua MLA (9ú heag.)Watzlawick, Paul, agus John H. weakland. Change: Principles of Problem Formation and Problem Resolution. ed. W. W. Norton & company Inc., 1974.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.