references.bib

@article{Sonia16,
   author = {Sonia Anastasia, Indra Budi},
   title = {Twitter sentiment analysis of online transportation service providers},
   university = {University of Indonesia},
   url = {https://ieeexplore.ieee.org/abstract/document/7872807},
   year = {2016},
   type = {Journal Article}
}

@article{Effendy16,
   author = {Veronikha Effendy, Anita Novantirani, Mira Kania Sabariah},
   title = {Sentiment Analysis on Twitter about the Use of City Public Transportation Using Support Vector Machine Method},
   university = {Telkom University},
   url = {https://socj.telkomuniversity.ac.id/ojs/index.php/ijoict/article/view/85},
   year = {2016},
   type = {Journal Article}
}

@Article{tidytext,
    title = {tidytext: Text Mining and Analysis Using Tidy Data
      Principles in R},
    author = {Julia Silge and David Robinson},
    doi = {10.21105/joss.00037},
    url = {http://dx.doi.org/10.21105/joss.00037},
    year = {2016},
    publisher = {The Open Journal},
    volume = {1},
    number = {3},
    journal = {JOSS},
}

@Manual{sentimentr,
    title = {{sentimentr}: Calculate Text Polarity Sentiment},
    author = {Tyler W. Rinker},
    address = {Buffalo, New York},
    note = {version 2.9.0},
    year = {2021},
    url = {https://github.com/trinker/sentimentr},
  }