Kotler, P., & Armstrong, G. (1996). Principles of marketing (7th.ed.). Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Kotler, Philip, agus Gary Armstrong. Principles of Marketing. 7th.ed. New Jersey: Prentice Hall, 1996.
Lua MLA (9ú heag.)Kotler, Philip, agus Gary Armstrong. Principles of Marketing. 7th.ed. Prentice Hall, 1996.
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