Soon Fook Fong and  Aldalalah and  M. Osamah,  Modality and Redundancy Effects on Music Theory Learning Among Pupils of Different Anxiety Levels.   journal   = {International Journal of Educational and Pedagogical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    July 2010, vol. 43(7). 1622 - 1630
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/1622.