To cite package ‘arm’ in publications use:

Gelman A, Su Y (2026). arm: Data Analysis Using Regression and Multilevel/Hierarchical Models. R package version 1.15-3, https://github.com/suyusung/arm.

Corresponding BibTeX entry:

  @Manual{,
    title = {arm: Data Analysis Using Regression and
      Multilevel/Hierarchical Models},
    author = {Andrew Gelman and Yu-Sung Su},
    year = {2026},
    note = {R package version 1.15-3},
    url = {https://github.com/suyusung/arm},
  }