@book{104409,
	author = {Silvagni, Federico,},
	title = {La gramática de ser y estar /},
	publisher = {Arco/Libros, S. L.,},
	year = {[2021]},
	series = {Cuadernos de lengua española ;},
	address = {Madrid :},
	url = {https://login.zproxy.cun.edu.co/login?url=https://www.digitaliapublishing.com/a/137324/}
}