To cite package ‘rrapply’ in publications use:

  Chau J (2024). _rrapply: Revisiting Base Rapply_. R package version
  1.2.7, <https://CRAN.R-project.org/package=rrapply>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {rrapply: Revisiting Base Rapply},
    author = {Joris Chau},
    year = {2024},
    note = {R package version 1.2.7},
    url = {https://CRAN.R-project.org/package=rrapply},
  }