To cite the posterior R package:

  Bürkner P, Gabry J, Kay M, Vehtari A (2024). “posterior: Tools for
  Working with Posterior Distributions.” R package version 1.6.0,
  <https://mc-stan.org/posterior/>.

A BibTeX entry for LaTeX users is

  @Misc{,
    title = {posterior: Tools for Working with Posterior Distributions},
    author = {Paul-Christian Bürkner and Jonah Gabry and Matthew Kay and Aki Vehtari},
    year = {2024},
    note = {R package version 1.6.0},
    url = {https://mc-stan.org/posterior/},
  }

To cite the MCMC convergence diagnostics:

  Vehtari A, Gelman A, Simpson D, Carpenter B, Bürkner P (2021).
  “Rank-normalization, folding, and localization: An improved Rhat for
  assessing convergence of MCMC (with discussion).” _Bayesian
  Analysis_.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Rank-normalization, folding, and localization: An improved Rhat
for assessing convergence of MCMC (with discussion)},
    author = {Aki Vehtari and Andrew Gelman and Daniel Simpson and Bob Carpenter and Paul-Christian Bürkner},
    year = {2021},
    journal = {Bayesian Analysis},
  }