Roberts, A. R. (1991). Contemporary perspectives on crisis intervention and prevention. Prentice Hall.
Cita Chicago (17th ed.)Roberts, Albert R. Contemporary Perspectives on Crisis Intervention and Prevention. Englewood Cliffs, N.J: Prentice Hall, 1991.
Cita MLA (9th ed.)Roberts, Albert R. Contemporary Perspectives on Crisis Intervention and Prevention. Prentice Hall, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.