@book{21153,
	author = { Carbajal Romero, Carlos enrique  and Pérez, Carolina },
	title = {Seguridad privada G.G.P. LTDA. /},
	publisher = {Corporación Unificada Nacional de Educación Superior,},
	year = {2011.},
	address = {Bogotá(Colombia) :},
	edition = {                   }
}