Johnson, David W., 1940-
Joining together : group theory and group skills
Allyn and Bacon, 1997
Buku Teks
Johnson, David W., 1940-
Joining together : group theory and group skills
Allyn and Bacon, 2000
Buku Teks
Johnson, David W., 1940-
Joining together : group theory and group skills
Pearson Education, 2006
Buku Teks
Johnson, David W., 1940-
Joining together : group theory and group skills
Pearson, 2014
Buku Teks
Johnson, David W., 1940-
Joining together : group theory and group skills
Pearson, 2017
Buku Teks