APA-čujuhus (7. p.)

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

Chicago-čujuhus (17. p.)

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

MLA-čujuhus (9. p.)

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

Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.