Espinoza-Audelo, L. F. (2020). Current situation of competitiveness and sustainability and COVID-19. Unidad Editorial UPTC.
Chicago-čujuhus (17. p.)Espinoza-Audelo, Luis Fernando. Current Situation of Competitiveness and Sustainability and COVID-19. Unidad Editorial UPTC, 2020.
MLA-čujuhus (9. p.)Espinoza-Audelo, Luis Fernando. Current Situation of Competitiveness and Sustainability and COVID-19. Unidad Editorial UPTC, 2020.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.
