To cite package ‘ctypesio’ in publications use:

  Cheng M (2024). _ctypesio: Read and Write Standard C Types from
  Files, Connections and Raw Vectors_. R package version 0.1.1,
  <https://CRAN.R-project.org/package=ctypesio>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {ctypesio: Read and Write Standard C Types from Files, Connections and Raw
Vectors},
    author = {Mike Cheng},
    year = {2024},
    note = {R package version 0.1.1},
    url = {https://CRAN.R-project.org/package=ctypesio},
  }