@book{304519,
	author = {U.P.R., Humacao.},
	title = {Cuadrivium :},
	publisher = {Departamento de Español, U.P.R. Humacao, },
	year = {1998-},
	address = {Humacao, P.R: },
	url = {https://issuu.com/uprhumacao/stacks/fe621faef15c4879b0acd96e25ad907d}
}