@book{99894,
	author = {Toynbee, Arnold Joseph,  and Somervell, D. C.},
	title = {Estudio de la historia.},
	publisher = {Alianza Editorial},
	year = {1971.},
	address = {Madrid},
	edition = {2da. ed.},
	note = {Translation of: A strudy of history, abridgement.}
}