To cite package ‘littler’ in publications use:

  Eddelbuettel D, Horner J (2025). _littler: R at the Command-Line via
  'r'_. R package version 0.3.20.4, ,
  <https://github.com/eddelbuettel/littler>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {littler: R at the Command-Line via 'r'},
    author = {Dirk Eddelbuettel and Jeff Horner},
    year = {2025},
    note = {R package version 0.3.20.4, 
},
    url = {https://github.com/eddelbuettel/littler},
  }