Tomado de: https://www.dian.gov.co/DIAN/12SobreD.nsf/FC22BC5CF1AB7BFA05257030005C2805/97F91AC66657EBC205257C680079E512?OpenDocument
Nuevos Videos Informativos Sobre Reforma Tributaria. (Actualizados 2014)
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Tomado de: https://www.dian.gov.co/DIAN/12SobreD.nsf/FC22BC5CF1AB7BFA05257030005C2805/97F91AC66657EBC205257C680079E512?OpenDocument