Medina-Rivera, A. (2019). Attitudes towards Spoken and Written Spanish Language of the United States. Universidad Pedagógica y Tecnológica de Colombia.
Lua i Stíl Chicago (17ú heag.)Medina-Rivera, Antonio. Attitudes Towards Spoken and Written Spanish Language of the United States. Universidad Pedagógica y Tecnológica de Colombia, 2019.
Lua MLA (9ú heag.)Medina-Rivera, Antonio. Attitudes Towards Spoken and Written Spanish Language of the United States. Universidad Pedagógica y Tecnológica de Colombia, 2019.
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