_ https://arturocalle.wordpress.com/2013/03/17/mision-y-vision/
_ https://www.arturocalle.com/politica-etica-empresarial
o.images.search.yahoo.com/search/images;_ylt=AwrE.s.l23NkPDU4ol.rcgx.;_ylu=Y29sbwNiZjEEcG9zAzEEdnRpZAMEc2VjA3BpdnM-?p=segurida+y+salud+en+el+trabajo&fr2=piv-web&type=E210CO1490G0&fr=mcafee#id=14&iurl=http%3A%2F%2Feventosvrin.unsaac.edu.pe%2Fdata_img%2F209C-181129104458-CURSO.jpg&action=click
https://www.semana.com/economia/capsulas/articulo/trabajo-si-hay-arturo-calle-ofrece-buenos-salarios-para-2023-y-paga-hasta-6-millones/202348/
https://www.arturocalle.com/politica-etica-empresarial
https://www.arturocalle.com/historia
https://www.arturocalle.com/linea-etica