@book{1907,
	author = {Hewlitt,Paul.G},
	title = {Conceptual physics teacher's edition /},
	publisher = {Pearson Prentice Hall,},
	year = {2002.},
	address = {[S.l.] :},
	edition = {3 Tch ed.},
	url = {http://www.amazon.com/exec/obidos/ASIN/0130542563/chopaconline-20}
}