Hague, P. N., Hague, N., & Morgan, C. (2004). Market research in practice: A guide to the basics. Kogan Page.
Chicago Style (17th ed.) ZitazioaHague, Paul N., Nick Hague, eta Carol-Ann Morgan. Market Research in Practice: A Guide to the Basics. London ; Sterling, VA: Kogan Page, 2004.
MLA (9th ed.) ZitazioaHague, Paul N., et al. Market Research in Practice: A Guide to the Basics. Kogan Page, 2004.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.