@book{31618,
	author = {Wagner, Richard.},
	title = {Ópera y drama /},
	publisher = {Ediciones Akal,},
	year = {2013.},
	series = {Akal Música},
	address = {Madrid :},
	note = {Contiene índice.},
	url = {https://elibro.net/ereader/politecnicointernacional/49655}
}