1
by Willke
Published 2007
2
by Drucker
Published 1992
3
by Brockling
Published 2016
4
5
by Odiorne
Published 1982
6
7
by Berk
Published 1993
8
by Raj
Published 1990
9
by Drucker
Published 1992
10
11
by Schaffer
Published 2001
12
by Barjoyai Bardai
Published 2000
13
by Barjoyai Bardai
Published 2000
14
by Deresky
Published 1994
15
16
by Zimmerman
Published 1991
17
by Davenport
Published 1998
18
by Herman
Published 2001
19
by Omae, 1943-
Published 1982
20
by Weihrich
Published 1993