KOTLER, P., & ARMSTRONG, G. (1996). Principles of marketing.-- ed.7. Prentice Hall.
Lua i Stíl Chicago (17ú heag.)KOTLER, Philip, agus Gary ARMSTRONG. Principles of Marketing.-- Ed.7. London: Prentice Hall, 1996.
Lua MLA (9ú heag.)KOTLER, Philip, agus Gary ARMSTRONG. Principles of Marketing.-- Ed.7. Prentice Hall, 1996.
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