Lua APA (7ú heag.)

Álvarez Ulloa, L. C. (2020). Effects during the COVID-19 pandemic, in the mental health. Universidad Pedagógica y Tecnológica de Colombia.

Lua i Stíl Chicago (17ú heag.)

Álvarez Ulloa, Luisa Cristina. Effects During the COVID-19 Pandemic, in the Mental Health. Universidad Pedagógica y Tecnológica de Colombia, 2020.

Lua MLA (9ú heag.)

Álvarez Ulloa, Luisa Cristina. Effects During the COVID-19 Pandemic, in the Mental Health. Universidad Pedagógica y Tecnológica de Colombia, 2020.

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