Aaker, D. (1995). Marketing research (5th.). John wiley.
Cita Chicago (17th ed.)Aaker, David. Marketing Research. 5th. New york: John wiley, 1995.
Cita MLA (9th ed.)Aaker, David. Marketing Research. 5th. John wiley, 1995.
Atenció: Aquestes cites poden no estar 100% correctes.