1
2
3
by Crawley, John
Published 1992
4
5
6
by De Bono, Edward, 1933-
Published 1985
7
8
Published 1991
9
by Tjosvold, Dean
Published 1993
10
Published 1993
11
Published 1994
12
by Dana, Daniel
Published 2001
13
Published 2000
14
15
16
by Jeong, Ho-Won.
Published 2010
17
Published 1990
18
by Burton, John W, 1915-
Published 1990
19
by Schwarz, Roger M.
Published 1994
20