Lua APA (7ú heag.)

Espinoza-Audelo, L. F. (2020). Current situation of competitiveness and sustainability and COVID-19. Unidad Editorial UPTC.

Lua i Stíl Chicago (17ú heag.)

Espinoza-Audelo, Luis Fernando. Current Situation of Competitiveness and Sustainability and COVID-19. Unidad Editorial UPTC, 2020.

Lua MLA (9ú heag.)

Espinoza-Audelo, Luis Fernando. Current Situation of Competitiveness and Sustainability and COVID-19. Unidad Editorial UPTC, 2020.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.