To cite package ‘bpnreg’ in publications use:

  Cremers J (2024). _bpnreg: Bayesian Projected Normal Regression
  Models for Circular Data_. R package version 2.0.3,
  <https://CRAN.R-project.org/package=bpnreg>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {bpnreg: Bayesian Projected Normal Regression Models for Circular Data},
    author = {Jolien Cremers},
    year = {2024},
    note = {R package version 2.0.3},
    url = {https://CRAN.R-project.org/package=bpnreg},
  }