@book{638,
	author = { Colander, David C.},
	title = {Microeconomics},
	publisher = {McGraw-Hill,},
	year = {2010.},
	address = {Boston, Mass :},
	edition = {8th ed},
	url = {http://www.loc.gov/catdir/enhancements/fy0668/2005043862-d.htm. http://www.loc.gov/catdir/enhancements/fy0668/2005043862-t.html}
}