Bradley, N. (2007). Marketing research: Tools and techniques. OUP.
Chicago Style aipamenaBradley, Nigel. Marketing Research: Tools and Techniques. New Delhi: OUP, 2007.
MLA aipamenaBradley, Nigel. Marketing Research: Tools and Techniques. OUP, 2007.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.