Please cite the QCA package as:

Dusa, Adrian, and Alrik Thiem. 2014. Qualitative Comparative Analysis. R Package Version 1.1-4. URL: http://cran.r-project.org/package=QCA.

Corresponding BibTeX entry:

  @Manual{,
    author = {Adrian Dusa and Alrik Thiem},
    year = {2014},
    title = {Qualitative Comparative Analysis},
    note = {R Package Version 1.1-4},
    url = {http://cran.r-project.org/package=QCA},
  }