@book{115070,
	author = {Langan, John,},
	title = {Sentence skills with readings /},
	publisher = {McGraw-Hill,},
	year = {c2001.},
	address = {Boston :},
	edition = {2nd ed.},
	url = {http://www.loc.gov/catdir/toc/mh041/00030550.html}
}