Please cite the QCApro package as:

Thiem A (2018). Advanced Functionality for Performing and Evaluating Qualitative Comparative Analysis. R Package Version 1.1-2, http://www.alrik-thiem.net/software/.

Corresponding BibTeX entry:

  @Manual{,
    author = {Alrik Thiem},
    year = {2018},
    title = {Advanced Functionality for Performing and Evaluating
      Qualitative Comparative Analysis},
    note = {R Package Version 1.1-2},
    url = {http://www.alrik-thiem.net/software/},
  }