@book{7161,
	author = {Kotler, Philip and Armstrong, Gary},
	title = {Principles of marketing /},
	publisher = {Pearson/Prentice Hall,},
	year = {2008.},
	address = {Upper Saddle River, N.J. :},
	edition = {12th ed.},
	url = {http://www.loc.gov/catdir/toc/ecip078/2007000562.html}
}