@book{166887,
	author = {Covey, Stephen Richards, and Merrill, A. Roger.},
	title = {Primero lo primero. Reflexiones diarias :},
	publisher = {Paidós ,},
	year = {1999.},
	series = {Paidos empresa},
	address = {Barcelona :},
	note = {Translation of: First things first every day .}
}