<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/AggregateRating>
<https://es.scribd.com/doc/95247565/Contabilidad-de-Costos-3ra-Edicion-Ralph-S-Polimeni-Frank-J-Fabozzi-Arthur-H-Adelberg-Michael-A-Kole3>