APA
Ketchen D. J., . (2009). Strategy, 2008-2009. Boston: McGraw-Hill/Irwin.
Chicago
Ketchen David J, . 2009. Strategy, 2008-2009. Boston: McGraw-Hill/Irwin.
Harvard
Ketchen D. J., . (2009). Strategy, 2008-2009. Boston: McGraw-Hill/Irwin.
MLA
Ketchen David J, . Strategy, 2008-2009. Boston: McGraw-Hill/Irwin. 2009.