To cite package ‘varhandle’ in publications use:

  Mahmoudian M (2023). _varhandle: Functions for Robust Variable
  Handling_. R package version 2.0.6,
  <https://codeberg.org/mehrad/varhandle>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {varhandle: Functions for Robust Variable Handling},
    author = {Mehrad Mahmoudian},
    year = {2023},
    note = {R package version 2.0.6},
    url = {https://codeberg.org/mehrad/varhandle},
  }