1
by Kotler, Philip
Published 2006
2
3
by Cortada, James W.
Published 1993
4
5
by Jain, Subhash C.
Published 1997
6
7
8
9
by Buss, John H.
Published 1991
10
Published 1994
11
by Day, George S.
Published 1986
12
13
by Yeshin, Tony
Published 1995
14
by Cohen, William A.
Published 1988
15
16
Published 1990
17
by Kotler, Philip
Published 2000
18
19
20