To cite package ‘irtoys’ in publications use:

Partchev I, Maris G (2022). irtoys: A Collection of Functions Related to Item Response Theory (IRT). R package version 0.2.2, https://CRAN.R-project.org/package=irtoys.

Corresponding BibTeX entry:

  @Manual{,
    title = {irtoys: A Collection of Functions Related to Item Response
      Theory (IRT)},
    author = {Ivailo Partchev and Gunter Maris},
    year = {2022},
    note = {R package version 0.2.2},
    url = {https://CRAN.R-project.org/package=irtoys},
  }