Klopf, D. W. (1985). Interacting in groups: Theory and practice (2ª ed.). Norton.
Cita Chicago (17th ed.)Klopf, Donald W. Interacting in Groups: Theory and Practice. 2ª ed. Norton, 1985.
Cita MLA (9th ed.)Klopf, Donald W. Interacting in Groups: Theory and Practice. 2ª ed. Norton, 1985.
Atenció: Aquestes cites poden no estar 100% correctes.