Feig, B. (1999). Winning marketing strategies. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Feig, Barry. Winning Marketing Strategies. Paramus, N.J: Prentice-Hall, 1999.
Lua MLA (9ú heag.)Feig, Barry. Winning Marketing Strategies. Prentice-Hall, 1999.
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