@book{20051,
	author = {Lagerlöf, Selma and Guillén de Nicolau, Palma},
	title = {El maravilloso viaje de Nils Holgersson},
	publisher = {Porrúa},
	year = {1998},
	series = {Sepan cuantos...},
	address = {México, D.F.},
	edition = {9ª ed.}
}