Lua APA (7ú heag.)

TULL DONALD S. (2009). MARKETING RESEARCH: MEASUREMENT AND METHOD (6TH.). PRENTICE HALL OF INDIA.

Lua i Stíl Chicago (17ú heag.)

TULL DONALD S. MARKETING RESEARCH: MEASUREMENT AND METHOD. 6TH. NEW DELHI: PRENTICE HALL OF INDIA, 2009.

Lua MLA (9ú heag.)

TULL DONALD S. MARKETING RESEARCH: MEASUREMENT AND METHOD. 6TH. PRENTICE HALL OF INDIA, 2009.

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