@book{26415,
	title = {Niklas Luhmann :},
	publisher = {Proyecto A Ediciones,},
	year = {1997.},
	series = {Revista anthropos: huellas del conocimiento,},
	address = {Barcelona :},
	note = {Cover title.},
	url = {https://login.zproxy.cun.edu.co/login?url=https://www.digitaliapublishing.com/a/3732/}
}