1
2
by Hovi, Jon, 1956-
Published 1998
3
by Holsti, Ole R.
Published 1972
4
by Froggatt, Helen
Published 1991
5
6
by Manheim, Jarol B, 1946-
Published 1994
7
by Spencer, Ernest
Published 1987
8
by Goleman, Daniel
Published 2002
9
Published 1996
10
11
12
by Bay, Tom
Published 2005
13
by Hall, Richard.
Published 2011
14
by De Bono, Edward, 1933-
Published 1991
15
by Cypert, Samuel A.
Published 1994
16
17
18
by Vong, Elvin.
Published 2010
19
20
by Hennezel, Marie de.
Published 2012