@book{113521,
	author = {Krippendorff, Klaus},
	title = {Metodología de análisis de contenido :},
	publisher = {Ediciones Paidós Ibérica,},
	year = {c1990.},
	series = {Paidos comunicacion},
	address = {Barcelona:},
	note = {Translation of : Content analysis. An introduction to its methology.}
}