To cite the 'CDM' package in publications use:

  George, A. C., Robitzsch, A., Kiefer, T., Gross, J., & Uenlue, A.
  (2016). The R Package CDM for cognitive diagnosis models. Journal of
  Statistical Software, 74(2), 1-24. doi:10.18637/jss.v074.i02

A BibTeX entry for LaTeX users is

  @Article{jsscdm,
    title = {The {R} Package {CDM} for Cognitive Diagnosis Models},
    author = {Ann Cathrice George and Alexander Robitzsch and Thomas Kiefer and J{\"u}rgen Gro{\ss} and Ali {\"U}nl{\"u}},
    journal = {Journal of Statistical Software},
    year = {2016},
    volume = {74},
    number = {2},
    pages = {1--24},
    doi = {10.18637/jss.v074.i02},
  }

  Robitzsch, A., Kiefer, T., George, A. C., & Uenlue, A. (2024). CDM:
  Cognitive Diagnosis Modeling. R package version 8.3-7.
  https://CRAN.R-project.org/package=CDM

A BibTeX entry for LaTeX users is

  @Manual{CDM_8.3-7,
    title = {CDM: Cognitive Diagnosis Modeling},
    author = {Alexander Robitzsch and Thomas Kiefer and Ann Cathrice George and Ali {\"U}nl{\"u}},
    year = {2024},
    note = {R package version 8.3-7},
    url = {https://CRAN.R-project.org/package=CDM},
    doi = {10.32614/CRAN.package.CDM},
  }