WASET
    David Hallberg,  Socioculture and Cognitivist Perspectives on Language and Communication Barriers in Learning.   journal   = {International Journal of Educational and Pedagogical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    December 2009, vol. 36(12). 2102 - 2111
    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/13753.