@book{15677,
	author = {Aaker, David A. and Kumar, V.,},
	title = {Marketing research /},
	publisher = {Wiley,},
	year = {c1998.},
	address = {New York :},
	edition = {6th ed.},
	url = {http://www.loc.gov/catdir/toc/onix03/97021710.html}
}