To cite package ‘callme’ in publications use:

  Cheng M (2024). _callme: Easily Compile and Call Inline 'C'
  Functions_. R package version 0.1.11,
  <https://CRAN.R-project.org/package=callme>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {callme: Easily Compile and Call Inline 'C' Functions},
    author = {Mike Cheng},
    year = {2024},
    note = {R package version 0.1.11},
    url = {https://CRAN.R-project.org/package=callme},
  }