Marcum, W. (1991). Teenagers and group dynamics. Group Books.
Chicago-čujuhus (17. p.)Marcum, Walt. Teenagers and Group Dynamics. Colorado: Group Books, 1991.
MLA-čujuhus (9. p.)Marcum, Walt. Teenagers and Group Dynamics. Group Books, 1991.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.