@book{9034,
	author = {Choy, Penelope. and Clark, Dorothy Goldbart.},
	title = {Basic grammar and usage /},
	publisher = {Cengage Learning,},
	year = {1998.},
	address = {[S.l.] :},
	edition = {5th ed.},
	url = {http://www.amazon.com/exec/obidos/ASIN/1428211551/chopaconline-20}
}