To cite package ‘fcirt’ in publications use:

  Tu N, Joo S, Lee P, Stark S (2025). _fcirt: Forced Choice in Item
  Response Theory_. R package version 0.2.1,
  <https://CRAN.R-project.org/package=fcirt>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {fcirt: Forced Choice in Item Response Theory},
    author = {Naidan Tu and Seang-Hwane Joo and Philseok Lee and Stephen Stark},
    year = {2025},
    note = {R package version 0.2.1},
    url = {https://CRAN.R-project.org/package=fcirt},
  }