To cite package ‘quantreg’ in publications use:

Koenker R (2025). quantreg: Quantile Regression. R package version 6.1, https://CRAN.R-project.org/package=quantreg.

Corresponding BibTeX entry:

  @Manual{,
    title = {quantreg: Quantile Regression},
    author = {Roger Koenker},
    year = {2025},
    note = {R package version 6.1},
    url = {https://CRAN.R-project.org/package=quantreg},
  }