Lua APA (7ú heag.)

Bearden, W. O. (2001). Marketing ed.3. McGraw-Hill.

Lua i Stíl Chicago (17ú heag.)

Bearden, William O. Marketing Ed.3. McGraw-Hill, 2001.

Lua MLA (8ú heag.)

Bearden, William O. Marketing Ed.3. McGraw-Hill, 2001.

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