To cite package ‘gradeR’ in publications use:

  Brown T (2021). _gradeR: Helps Grade Assignment Submissions that are
  R Scripts_. R package version 1.0.10,
  <https://CRAN.R-project.org/package=gradeR>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {gradeR: Helps Grade Assignment Submissions that are R Scripts},
    author = {Taylor Brown},
    year = {2021},
    note = {R package version 1.0.10},
    url = {https://CRAN.R-project.org/package=gradeR},
  }