@book{51759,
	author = {Vargas, Awilda and Negrón, Mildred. and  Pontificia Universidad Católica de Puerto Rico.},
	title = {El uso de las tarjetas de credito luego de implantada la Reforma Contributiva de Puerto Rico},
	publisher = {Las Autoras},
	year = {1992.},
	address = {Ponce, P. R.}
}