@book{2270,
	author = {Gaff, Jackie. and Winton, Ian,},
	title = {¿Por qué debo... /},
	publisher = {Everest,},
	year = {2007.},
	series = {¿Por qué debo...},
	address = {León (España) :},
	edition = {1a. ed.},
	note = {Títulos originales : v.1 : Título original : Why must I take exercise?. ;}
}