Gaya APA
Bradford, Leland P.. (1978).
Group Development .
California:
University Associates.
Gaya Chicago
Bradford, Leland P..
Group Development.
California:
University Associates,
1978.
Text.
Gaya MLA
Bradford, Leland P..
Group Development.
California:
University Associates,
1978.
Text.
Gaya Turabian
Bradford, Leland P..
Group Development.
California:
University Associates,
1978.
Print.