Caro Lopera, M. A., & García Zambrano, L. P. (2020). Argumentative Trends in Opinion Columns in Two High Circulation Colombian Newspapers. Universidad Pedagógica y Tecnológica de Colombia.
Čikaški stil citiranja (17. izdanje)Caro Lopera, Miguel Angel, i Liliana Patricia García Zambrano. Argumentative Trends in Opinion Columns in Two High Circulation Colombian Newspapers. Universidad Pedagógica y Tecnológica de Colombia, 2020.
MLA način citiranja (9. izdanje)Caro Lopera, Miguel Angel, i Liliana Patricia García Zambrano. Argumentative Trends in Opinion Columns in Two High Circulation Colombian Newspapers. Universidad Pedagógica y Tecnológica de Colombia, 2020.
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