To cite package ‘cmdstanr’ in publications use:

  Gabry J, Češnovar R, Johnson A, Bronder S (2026). _cmdstanr: R
  Interface to 'CmdStan'_. R package version 0.9.0.9002,
  <https://github.com/stan-dev/cmdstanr>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {cmdstanr: R Interface to 'CmdStan'},
    author = {Jonah Gabry and Rok Češnovar and Andrew Johnson and Steve Bronder},
    year = {2026},
    note = {R package version 0.9.0.9002},
    url = {https://github.com/stan-dev/cmdstanr},
  }
