1
by Lamb, Christopher
Published 1989
2
3
by Moens, Alexander, 1959-
Published 1990
4
by Holsti, Ole R
Published 2006
5
by Houghton, David Patrick
Published 2001
6
7
8
9
by Hinckley, Ronald H.
Published 1992
10
by Woodward, Bob
Published 1991
11