Gaya APA
Pfeiffer, J, W., Jones, J, E. (1980).
The 1980 Annual Handbook for Group Facilitators .
California:
University Associate, Inc.
Gaya MLA
Pfeiffer, J., William., Jones, John, E..
"The 1980 Annual Handbook for Group Facilitators".
California:
University Associate, Inc,
1980.
Text.