Reiko Yamamoto,  The Effect of Cross-Curriculum of L1 and L2 on Elementary School Students’ Linguistic Proficiency: To Sympathize with Others.   journal   = {International Journal of Educational and Pedagogical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    November 2018, vol. 133(1). 31 - 34
    [viewed 23 October 2019]. Available from: https://publications.waset.org/pdf/10008349.