To cite package ‘ellmer’ in publications use:

  Wickham H, Cheng J (2025). _ellmer: Chat with Large Language Models_.
  R package version 0.1.0, <https://CRAN.R-project.org/package=ellmer>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {ellmer: Chat with Large Language Models},
    author = {Hadley Wickham and Joe Cheng},
    year = {2025},
    note = {R package version 0.1.0},
    url = {https://CRAN.R-project.org/package=ellmer},
  }