1
2
by Lincoln, Clive A.
Published 1994
3
by Sykes, Don
Published 1993
4
5
6
7
Published 1993
8
9
10
by Zikmund, William G.
Published 2003
11
by Beskeen, David W.
Published 2002
12
13
by Saunders, Mark.
Published 2003
14
by Bulmer, John
Published 2000
15
Published 2004
16
Published 2004
17
18
19
20