@book{143994,
	author = {Mañas Viniegra, Luis.},
	title = {Gestión de ventas :},
	publisher = {Editorial CEP S.L.,},
	year = {2014.},
	address = {Madrid :},
	note = {Incluye índice.},
	url = {https://elibro.net/ereader/politecnicointernacional/50941}
}