To cite klausuR in publications use:

michalke, m. (2015). klausuR: Multiple Choice Test Evaluation (Version 0.12-10). Available from http://r-forge.r-project.org/projects/klausur

Corresponding BibTeX entry:

  @Manual{,
    title = {klausuR: Multiple Choice Test Evaluation},
    author = {m.eik michalke},
    year = {2015},
    note = {(Version 0.12-10)},
    url = {http://r-forge.r-project.org/projects/klausur},
  }