@book{2117,
	author = {Hewitt, Paul G.},
	title = {Física conceptual /  },
	publisher = {Pearson-Addison Weasley;},
	year = {2007.},
	address = {México: },
	edition = {9a ed. en español },
	note = {Hewitt, P. G. (2007). Física conceptual. (9a ed.). México : Pearson ; Addison Weasley.}
}