LILIEN, G. L. (1992). Marketing Models / Gary L. Lilien; Philip Kotler And K. Sridhar Moorthy. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)LILIEN, Gary L. Marketing Models / Gary L. Lilien; Philip Kotler And K. Sridhar Moorthy. Prentice-Hall, 1992.
Lua MLA (8ú heag.)LILIEN, Gary L. Marketing Models / Gary L. Lilien; Philip Kotler And K. Sridhar Moorthy. Prentice-Hall, 1992.
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