Klopf, D. W. (1985). Interacting in groups: Theory and practice (2ª ed.). Norton.
Chicago-čujuhus (17. p.)Klopf, Donald W. Interacting in Groups: Theory and Practice. 2ª ed. Norton, 1985.
MLA-čujuhus (9. p.)Klopf, Donald W. Interacting in Groups: Theory and Practice. 2ª ed. Norton, 1985.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.