Gaya APA
Group Processes. (1987).
California:
SAGE Publications.
Gaya Chicago
Group Processes.
Cet.2.
California:
SAGE Publications,
1987.
.
Gaya MLA
Group Processes.
Cet.2.
California:
SAGE Publications,
1987.
.
Gaya Turabian
Group Processes.
California:
SAGE Publications,
1987.
.