To cite package ‘twang’ in publications use:

  Cefalu M, Ridgeway G, McCaffrey D, Morral A, Griffin BA, Burgette L
  (2025). _twang: Toolkit for Weighting and Analysis of Nonequivalent
  Groups_. R package version 2.6.2,
  <https://CRAN.R-project.org/package=twang>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {twang: Toolkit for Weighting and Analysis of Nonequivalent Groups},
    author = {Matthew Cefalu and Greg Ridgeway and Dan McCaffrey and Andrew Morral and Beth Ann Griffin and Lane Burgette},
    year = {2025},
    note = {R package version 2.6.2},
    url = {https://CRAN.R-project.org/package=twang},
  }