To cite package ‘marp’ in publications use:

  Kang J (2022). _marp: Model-Averaged Renewal Process_. R package
  version 0.1.0, <https://github.com/kanji709/marp>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {marp: Model-Averaged Renewal Process},
    author = {Jie Kang},
    year = {2022},
    note = {R package version 0.1.0},
    url = {https://github.com/kanji709/marp},
  }