@book{1139,
	author = {Porter, Michael E.},
	title = {Competitive advantage: creating and sustaining superior performance},
	publisher = {The Free Press,},
	year = {1985},
	address = {New York, USA :},
	url = {https://itmsp.museknowledge.com/UOH?qurl=https://libros-uoh.uoh.cl/ESCUELADECIENCIASSOCIALES/ADMINISTRACIONPUBLICA/Competitive-advantage-creating-and-sustaining-superior-performance}
}