1
by Livermore, David A.
Published 2011
AMACOM, American Management Association

2
by Tapscott, Don, Williams, Anthony D.
Published 2010
Tantor Media, Inc.

3
by Weiner, Edith
Published 2006
Pearson Prentice Hall

4
by Rodgers, Mark
Published 2015
American Management Association, AMACOM