KOTLER, P. (1993). Marketing An Introduction Philip Kotler Dan Gary Armstrong. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)KOTLER, Philip. Marketing An Introduction Philip Kotler Dan Gary Armstrong. Prentice-Hall, 1993.
Lua MLA (8ú heag.)KOTLER, Philip. Marketing An Introduction Philip Kotler Dan Gary Armstrong. Prentice-Hall, 1993.
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