To cite package ‘riskPredictClustData’ in publications use:

  Rosner B, Qiu W, Lee M (2018). _riskPredictClustData: Assessing Risk
  Predictions for Clustered Data_. R package version 0.2.6,
  <https://CRAN.R-project.org/package=riskPredictClustData>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {riskPredictClustData: Assessing Risk Predictions for Clustered Data},
    author = {Bernard Rosner and Weiliang Qiu and Meiling T. Lee},
    year = {2018},
    note = {R package version 0.2.6},
    url = {https://CRAN.R-project.org/package=riskPredictClustData},
  }