To cite package 'qualityTools' in publications use:

Thomas Roth ( 2016 ). qualityTools: Statistics in Quality Science. R package version 1.55 http://www.r-qualitytools.org .

Corresponding BibTeX entry:

  @Manual{,
    title = {qualityTools: Statistics in Quality Science.},
    author = {Thomas Roth},
    year = {2016},
    note = {R package version 1.55 http://www.r-qualitytools.org},
    url = {http://www.r-qualitytools.org},
  }