To cite package ‘NCA’ in publications use:

  Dul J (2024). _NCA: Necessary Condition Analysis_. R package version
  4.0.2, <https://CRAN.R-project.org/package=NCA>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {NCA: Necessary Condition Analysis},
    author = {Jan Dul},
    year = {2024},
    note = {R package version 4.0.2},
    url = {https://CRAN.R-project.org/package=NCA},
  }