Christiansen, Rich, 1965-
The zigzag principle: the goal-setting strategy that will revolutionize your business and your life
McGraw-Hill, 2012
 Buku Teks
Tracy, Brian
Focal point: a proven system to simplify your life, double your productivity, and achieve all your goals
American Management Association, 2002
 eBooks
Abrahan, Joe,author
Entrepreneurial DNA : the breakthrough discovery that aligns your business to your unique strengths
McGraw-Hill, 2011
 Buku Teks
Wilson, Susan B.
Goal setting: how to create an action plan and achieve your goals
American Management Association, 2008
 eBooks
Pearson, Barrie
Common-sense business Strategy : how to improve your profits and cash flow dramatically
Mercurry, 1991
 Buku Teks