Enlaces
[1] http://www.authorstream.com/Presentation/cvera-735555-historia-de-navidad/
[2] http://www.authorstream.com/Presentation/cvera-735563-a-christmas-story/
[3] http://www.slideboom.com/presentations/271717/La-r%C3%A9v%C3%A9lation-du-P%C3%A8re-No%C3%ABl