To cite watson in publications use:

Sablica L, Hornik K, Leydold J (2025). “watson: An R Package for Fitting Mixtures of Watson Distributions.” Journal of Statistical Software, 115(4), 1–30. doi:10.18637/jss.v115.i04.

Corresponding BibTeX entry:

  @Article{,
    title = {{watson}: An {R} Package for Fitting Mixtures of {W}atson
      Distributions},
    author = {Lukas Sablica and Kurt Hornik and Josef Leydold},
    journal = {Journal of Statistical Software},
    year = {2025},
    volume = {115},
    number = {4},
    pages = {1--30},
    doi = {10.18637/jss.v115.i04},
  }