To cite package ‘bit64’ in publications use:

  Oehlschlägel J (2024). _bit64: A S3 Class for Vectors of 64bit
  Integers_. R package version 4.5.2,
  <https://github.com/truecluster/bit64>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {bit64: A S3 Class for Vectors of 64bit Integers},
    author = {Jens Oehlschlägel},
    year = {2024},
    note = {R package version 4.5.2},
    url = {https://github.com/truecluster/bit64},
  }