1
2
by Kotler, Philip
Published 2006
3
4
5
by Whitley,Alma
Published 1997
6
7
by Gabriel, Vincent
Published 1989
8
9
10
by Block, Stanley B.
Published 2002
11
by Siropolis, Nicholas
Published 1997
12
13
by Gordon, Judith R.
Published 2002
14
by Schwalbe, Kathy.
Published 2000
15
by Jain, Subhash C.
Published 2000
16
17
by Griffin, Ricky W.
Published 1999
18
19
by Kotler, Philip
Published 2003
20