1
2
by Capron, H. L.
Published 1998
3
by McGloughlin, Stephen
Published 2001
4
5
by Turban, Efraim
Published 2003
6
7
by Lehnert, Wendy G.
Published 2003
8
by Robinson, Dan
Published 2003
9
by Beekman, George
Published 1997
10
11
by Beekman, George
Published 2002
12
13
by Beekman, George
Published 2005
14
by Daley, Bill
Published 2006
15
by Sprankle, Maureen
Published 2006
16
by Deitel, Harvey M.
Published 2005
17
18
by Kendall, Kenneth E.
Published 2008
19
by Range, J.
Published 1992
20