Lua APA (7ú heag.)

Etzel, M. J. (2007). Marketing (14th ed.). McGraw-Hill/Irwin.

Lua i Stíl Chicago (17ú heag.)

Etzel, Michael J. Marketing. 14th ed. Boston ; New Delhi: McGraw-Hill/Irwin, 2007.

Lua MLA (8ú heag.)

Etzel, Michael J. Marketing. 14th ed. McGraw-Hill/Irwin, 2007.

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