@book{83514,
	author = {Copi, Irving M. and Sestier Boulier, Andrés},
	title = {Lógica simbólica},
	publisher = {: Patria},
	year = {, 2009},
	address = {México},
	edition = {2a edición},
	note = {Vigésima sexta reimpresión.}
}