Pride, W. M., & Ferrell, O. C. (1989). Marketing cases (4th ed.). Hougton Mifflin.
Lua i Stíl Chicago (17ú heag.)Pride, William M., agus O. C. Ferrell. Marketing Cases. 4th ed. Dallas Geneva, Illinois: Hougton Mifflin, 1989.
Lua MLA (9ú heag.)Pride, William M., agus O. C. Ferrell. Marketing Cases. 4th ed. Hougton Mifflin, 1989.
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