@book{11775,
	author = {Maddala, G.S and Lahiri, Kajal},
	title = {Introduction to econometrics /},
	publisher = {Willey and Sons,},
	year = {2009},
	address = {United Kingdom :},
	edition = {fourth edition},
	url = {http://www.loc.gov/catdir/toc/ecip0615/2006018388.html}
}