To cite package ‘b64’ in publications use:

  Parry J (2024). _b64: Fast and Vectorized Base 64 Engine_. R package
  version 0.1.3, <https://CRAN.R-project.org/package=b64>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {b64: Fast and Vectorized Base 64 Engine},
    author = {Josiah Parry},
    year = {2024},
    note = {R package version 0.1.3},
    url = {https://CRAN.R-project.org/package=b64},
  }