@book{125678,
	author = {Lefcovich, Mauricio León. and e-libro, Corp.},
	title = {Preguntas y respuestas sobre Seis Sigma},
	publisher = {[El Cid Editor | apuntes],},
	year = {[2009]},
	address = {[Santa Fe, Argentina] :},
	url = {https://elibro.net/ereader/politecnicointernacional/31384}
}