Gaya APA
Group Processes.. (1987).
London:
SAGE Publications.
Gaya Chicago
Group Processes..
~.
London:
SAGE Publications,
1987.
Buku.
Gaya MLA
Group Processes..
~.
London:
SAGE Publications,
1987.
Buku.
Gaya Turabian
Group Processes..
London:
SAGE Publications,
1987.
Buku.