To cite the 'irtlink' package in publications use:

  Engels, O. (2026). irtlink: IRT Linking and Linking Error Estimation
  Across Time Points and Groups. R package version 0.1.0.
  https://CRAN.R-project.org/package=irtlink

A BibTeX entry for LaTeX users is

  @Manual{irtlink_0.1.0,
    title = {irtlink: IRT Linking and Linking Error Estimation Across Time Points and
Groups},
    author = {Oskar Engels},
    year = {2026},
    note = {R package version 0.1.0},
    url = {https://CRAN.R-project.org/package=irtlink},
  }