To cite package ‘printr’ in publications use:

  Xie Y (2024). _printr: Automatically Print R Objects to Appropriate
  Formats According to the 'knitr' Output Format_. R package version
  0.3.1, <https://github.com/yihui/printr>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {printr: Automatically Print R Objects to Appropriate Formats According
to the 'knitr' Output Format},
    author = {Yihui Xie},
    year = {2024},
    note = {R package version 0.3.1},
    url = {https://github.com/yihui/printr},
  }