To cite package ‘catseyes’ in publications use:

  Andersen C (2020). _catseyes: Create Catseye Plots Illustrating the
  Normal Distribution of the Means_. R package version 0.2.5,
  <https://CRAN.R-project.org/package=catseyes>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {catseyes: Create Catseye Plots Illustrating the Normal Distribution of the
Means},
    author = {Clark Andersen},
    year = {2020},
    note = {R package version 0.2.5},
    url = {https://CRAN.R-project.org/package=catseyes},
  }