To cite the R package 'sentometrics' in publications use:

Ardia D, Bluteau K, Borms S, Boudt K (2020). The R Package sentometrics to Compute, Aggregate and Predict with Textual Sentiment. https://doi.org/10.2139/ssrn.3067734.

Corresponding BibTeX entry:

  @Manual{,
    title = {The R Package sentometrics to Compute, Aggregate and
      Predict with Textual Sentiment},
    author = {David Ardia and Keven Bluteau and Samuel Borms and Kris
      Boudt},
    url = {https://doi.org/10.2139/ssrn.3067734},
    year = {2020},
  }