To cite package ‘rockchalk’ in publications use:

Johnson P (2026). rockchalk: Regression Estimation and Presentation. R package version 1.8.164, https://CRAN.R-project.org/package=rockchalk.

Corresponding BibTeX entry:

  @Manual{,
    title = {rockchalk: Regression Estimation and Presentation},
    author = {Paul E. Johnson},
    year = {2026},
    note = {R package version 1.8.164},
    url = {https://CRAN.R-project.org/package=rockchalk},
  }