To cite package ‘Westerlund’ in publications use:

  Hung B (2026). _Westerlund: Panel Cointegration Tests Based on
  Westerlund (2007)_. R package version 0.1.3,
  <https://CRAN.R-project.org/package=Westerlund>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {Westerlund: Panel Cointegration Tests Based on Westerlund (2007)},
    author = {Bosco Hung},
    year = {2026},
    note = {R package version 0.1.3},
    url = {https://CRAN.R-project.org/package=Westerlund},
  }