@book{4015,
	author = {Urueña López, Alberto and Plan Avanza 2},
	title = {Estudio sobre comercio electrónico B2C 2009},
	publisher = {ONTSI,},
	year = {2009},
	series = {Estudio sobre comercio electrónico B2C (Internet)},
	address = {Madrid :},
	url = {http://www.ontsi.red.es/ontsi/sites/ontsi/files/estudio_b2c_2009__descargar_pdf_337kb__0.pdf},
}