Johnson, David W., 1940-, author
Joining together : group theory and group skills
Allyn and Bacon, 2000
 Buku Teks
Johnson, David W., 1940-, author
Joining together : group theory and group skills
Pearson Education, 2006
 Buku Teks
Johnson, David W., 1940-, author
Joining together : group theory and group skills
Pearson, 2014
 Buku Teks
Johnson, David W., 1940-, author
Joining together : group theory and group skills
Pearson, 2017
 Buku Teks
Blackwell handbook of social psychology: group processes
edited by Michael A. Hogg and R. Scott Tindale
Blackwell, 2003
 Buku Teks
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