To cite readSX in publications use:

Stephan Daus (2022). “Read Survey Data from SurveyXact with readSX.” An R-package developed for researchers and pollsters in the social sciences., https://CRAN.R-project.org/package=readSX.

Corresponding BibTeX entry:

  @Unpublished{readSX-package,
    title = {Read Survey Data from SurveyXact with {readSX}},
    author = {{Stephan Daus}},
    year = {2022},
    address = {Økernveien 9, Oslo},
    note = {An R-package developed for researchers and pollsters in the
      social sciences.},
    url = {https://CRAN.R-project.org/package=readSX},
  }