To cite sentometrics in publications use:

Ardia D, Bluteau K, Borms S, Boudt K (2021). “The R Package sentometrics to Compute, Aggregate, and Predict with Textual Sentiment.” Journal of Statistical Software, 99(2), 1–40. doi: 10.18637/jss.v099.i02.

Corresponding BibTeX entry:

  @Article{,
    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},
    journal = {Journal of Statistical Software},
    year = {2021},
    volume = {99},
    number = {2},
    pages = {1--40},
    doi = {10.18637/jss.v099.i02},
  }