KOTLER , P. (1998). Principles Of Marketing / Philip Kotler, Gary Armstrong. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)KOTLER , Philip. Principles Of Marketing / Philip Kotler, Gary Armstrong. Prentice-Hall, 1998.
Lua MLA (8ú heag.)KOTLER , Philip. Principles Of Marketing / Philip Kotler, Gary Armstrong. Prentice-Hall, 1998.
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