@book{79533,
	author = {Ángel, Allen R. and León Hernández, Francisco},
	title = {Álgebra intermedia},
	publisher = { : Prentice-Hall Hispanoamericana},
	year = {, 1992},
	address = {México},
	edition = {2a. edición},
	note = {Incluye: índice (pp. 561-567)}
}