1
2
by Peters, Tom
Published 1987
3
4
by Crosby, Philip B.
Published 1988
5
by Ries, Al
Published 1991
6
7
by Ries, Al
Published 1991
8
Published 1986
9
Published 1988
10
11
by Drucker, Peter F
Published 1987
12
by Winston, Stephanie
Published 1987
13
14
15
16
17
18
19
20
by Powell, Tag
Published 1986