ECORFAN Journal Bolivia, Volume 6, Number 11, December-2019, is a biannual Journal edited by ECORFAN-Bolivia and the international academy. Santa Lucia N-21, Barrio Libertadores, Cd. Sucre. Chuquisaca, Bolivia, http://www.ecorfan.org/bolivia/journal.php, journal@ecorfan.org. Editor in charge: Fernando Iglesias-Suarez, MsC ISSN: 2410-4191. Responsible for the last update of this issue ECORFAN Computer Unit. Imelda Escamilla Bouchán, PhD. Vladimir Luna Soto, PhD. Santa Lucia N-21, Barrio Libertadores, Cd. Sucre. Chuquisaca, Bolivia. Date of last update December 31, 2019. The opinions expressed by the authors do not necessarily reflect the position of the publisher of the publication. It is strictly forbidden the total or partial reproduction of the contents and images of the publication without previous authorization of the National Institute of the Right of Author