To cite package ‘truncreg’ in publications use:

  Croissant Y, Zeileis A (2026). _truncreg: Truncated Gaussian
  Regression Models_. R package version 0.3-0,
  <https://codeberg.org/zeileis/truncreg>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {truncreg: Truncated Gaussian Regression Models},
    author = {Yves Croissant and Achim Zeileis},
    year = {2026},
    note = {R package version 0.3-0},
    url = {https://codeberg.org/zeileis/truncreg},
  }