T-Group theory and laboratory method: innovation in re-education
John Wiley, 1964
 Buku Teks
Johnson, David W., 1940-, author
Joining together : group theory and group skills
Allyn and Bacon, 1997
 Buku Teks
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
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