To cite package ‘extras’ in publications use:

  Hill N, Thorley J (2024). _extras: Helper Functions for Bayesian
  Analyses_. R package version 0.7.3.9002, ,
  <https://github.com/poissonconsulting/extras>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {extras: Helper Functions for Bayesian Analyses},
    author = {Nicole Hill and Joe Thorley},
    year = {2024},
    note = {R package version 0.7.3.9002, 
},
    url = {https://github.com/poissonconsulting/extras},
  }