@book{30259,
	author = {Aaker, David A. and Kumar, V.,},
	title = {Marketing research.},
	publisher = {John Wiley & Sons,},
	year = {c2004.},
	address = {New York :},
	edition = {8th ed.},
	url = {http://www.loc.gov/catdir/description/wiley039/2003057663.html}
}