Duygu Aydın and  Aşina Gülerarslan and  Süleyman Karaçor and  Tarık Doğan,  Value of Sharing: Viral Advertisement.   journal   = {International Journal of Economics and Management Engineering}, [online]. World Academy of Science, Engineering and Technology.
    May 2013, vol. 77(5). 1211 - 1215
    [viewed 29 September 2020]. Available from: https://publications.waset.org/pdf/4765.