Cravens, D. W. (1997). Strategic marketing (5th ed.). Irwin.
Lua i Stíl Chicago (17ú heag.)Cravens, David W. Strategic Marketing. 5th ed. Chicago ; Boston: Irwin, 1997.
Lua MLA (8ú heag.)Cravens, David W. Strategic Marketing. 5th ed. Irwin, 1997.
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