@book{7911,
	author = {Johnsonbaugh, Richard and Giudici, Reinaldo; autor.},
	title = {Matemáticas discretas /},
	publisher = {Iberoamerica S.A., },
	year = {1988},
	address = {México, D. F.  :},
	edition = {Primera edición},
	note = {Incluye índice.}
}