To cite package 'SGPdata' in publications use:

Damian W. Betebenner, Adam Van Iwaarden and Ben Domingue (2013). SGPdata: Exemplar data sets for SGP analyses. (R package version 8.0-0.0. URL https://github.com/CenterForAssessment/SGPdata/

Corresponding BibTeX entry:

  @Manual{,
    title = {{SGPdata}: Exemplar data sets for SGP analyses.},
    author = {Damian W. Betebenner and Adam Van Iwaarden and Ben
      Domingue},
    year = {2013},
    note = {R package version 8.0-0.0},
    url = {https://github.com/CenterForAssessment/SGPdata/},
  }