@book{34676,
	author = {Roa Rojas, Hernan. and Roa Díaz, Cornelio.},
	title = {Regimen de contratacion estatal :},
	publisher = {Ecoe Ediciones,},
	year = {2008.},
	series = {Las leyes de Colombia. Códigos},
	address = {Bogotá :}
}