To cite package ‘classicaltest’ in publications use:

  Christiansen A (2024). _classicaltest: Classical Test Theory (CTT)
  Analysis_. R package version 0.7.0,
  <https://CRAN.R-project.org/package=classicaltest>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {classicaltest: Classical Test Theory (CTT) Analysis},
    author = {Andrés Christiansen},
    year = {2024},
    note = {R package version 0.7.0},
    url = {https://CRAN.R-project.org/package=classicaltest},
  }