To cite package ‘CTT’ in publications use:

Willse JT (2026). CTT: Classical Test Theory Functions. R package version 2.3.4, https://CRAN.R-project.org/package=CTT.

Corresponding BibTeX entry:

  @Manual{,
    title = {CTT: Classical Test Theory Functions},
    author = {John T. Willse},
    year = {2026},
    note = {R package version 2.3.4},
    url = {https://CRAN.R-project.org/package=CTT},
  }