WASET
    William Xiu Shun Wong and  Myungsu Lim and  Yoonjin Hyun and  Chen Liu and  Seongi Choi and  Dasom Kim and  Kee-Young Kwahk and  Namgyu Kim,  A Methodology for Investigating Public Opinion Using Multilevel Text Analysis.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    October 2015, vol. 108(12). 2409 - 2413
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/10002922.