@book{66618,
	author = {Gutiérrez Heredia, Ana and Gutiérrez Heredia, Ana},
	title = {Elaboración de mantequilla},
	publisher = {IC Editorial, },
	year = {[Fecha de publicación no identificada]},
	address = {[Madrid, España] :},
	url = {https://public.digitaliapublishing.com/a/86579}
}