To cite package ‘IRTC’ in publications use:

  Ma K (2026). _IRTC: Marginal Maximum Likelihood Estimation for Item
  Response Models_. R package version 1.1.2,
  <https://github.com/weiandata/irtc>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {IRTC: Marginal Maximum Likelihood Estimation for Item Response Models},
    author = {Kunxiang Ma},
    year = {2026},
    note = {R package version 1.1.2},
    url = {https://github.com/weiandata/irtc},
  }