WASET
    Michiko Miyamoto,  Searching for an Effective Marketing in the Food Supplement Industry in Japan.   journal   = {International Journal of Economics and Management Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2021, vol. 172(4). 320 - 330
    [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/10011938.