@book{21048,
	author = {Fletcher, Alan, and Fletcher, Alan, and Pentagram (Firma de diseño)},
	title = {Pentagram :},
	publisher = {Lund Humphries},
	year = {1972},
	address = {London},
	edition = {1a edición},
	note = {Obra que documenta el trabajo del colectivo de diseño Pentagram.}
}