Cooper, D. R., & Donald R. Cooper; Pamela S. Schindler. Marketing research. New York: McGraw-Hill/Irwin.
Chicago Style CitationCooper, Donald R., i Donald R. Cooper; Pamela S. Schindler. Marketing Research. New York: McGraw-Hill/Irwin.
Cita MLACooper, Donald R., i Donald R. Cooper; Pamela S. Schindler. Marketing Research. New York: McGraw-Hill/Irwin.
Atenció: Aquestes cites poden no estar 100% correctes.