WASET
    Chia-Ching Tsai,  The Conditioning Effect on Celebrity Multiple Endorsements.   journal   = {International Journal of Economics and Management Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2012, vol. 66(6). 1421 - 1425
    [viewed 23 April 2024]. Available from: https://publications.waset.org/pdf/9818.