WASET
    Fonseca Jully and  Chia Maribel and  Rodríguez Ilba,  Ads on Social Issues: A Tool for Improving Critical Thinking Skills in a Foreign Language Classroom.   journal   = {International Journal of Educational and Pedagogical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    January 2016, vol. 109(1). 260 - 268
    [viewed 16 April 2024]. Available from: https://publications.waset.org/pdf/10003529.