Kerin, R. A., & Peterson, R. A. (1998). Strategic marketing problems: Cases and comments (8th ed.). Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Kerin, Roger A., agus Robert A. Peterson. Strategic Marketing Problems: Cases and Comments. 8th ed. Upper Saddle River, N.J: Prentice Hall, 1998.
Lua MLA (9ú heag.)Kerin, Roger A., agus Robert A. Peterson. Strategic Marketing Problems: Cases and Comments. 8th ed. Prentice Hall, 1998.
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