To cite package ‘monad’ in publications use:

  Marttila M (2024). _monad: Operators and Generics for Monads_. R
  package version 0.1.1, <https://CRAN.R-project.org/package=monad>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {monad: Operators and Generics for Monads},
    author = {Mikko Marttila},
    year = {2024},
    note = {R package version 0.1.1},
    url = {https://CRAN.R-project.org/package=monad},
  }