Gaya APA

Kerin, R, A., Peterson, R, A. (1993). Strategic marketing problems : cases and comments (6th ed). Boston, MA: Allyn and Bacon.

Gaya MLA

Kerin, Roger, A.., Peterson, Robert, A.. "Strategic marketing problems : cases and comments". 6th ed Boston, MA: Allyn and Bacon, 1993. Text.