To cite package ‘plaqr’ in publications use:

  Maidman A (2017). _plaqr: Partially Linear Additive Quantile
  Regression_. R package version 2.0,
  <https://CRAN.R-project.org/package=plaqr>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {plaqr: Partially Linear Additive Quantile Regression},
    author = {Adam Maidman},
    year = {2017},
    note = {R package version 2.0},
    url = {https://CRAN.R-project.org/package=plaqr},
  }