Gaya APA

Kerin, R, A., Peterson, R, A. (1990). Strategic marketing problems: cases and comments; 5th ed. . Dallas: Allyn And Bacon.

Gaya MLA

Kerin, Roger, A.., Peterson, Robert, A.. "Strategic marketing problems: cases and comments; 5th ed.". Dallas: Allyn And Bacon, 1990. Text.