To cite the SGPdata package in publications use:

  Damian W. Betebenner, Adam R. Van Iwaarden and Ben Domingue (2024).
  SGPdata: Exemplar Data Sets for Student Growth Percentile (SGP)
  Analyses. (R package version 28.0-0.0. URL:
  https://centerforassessment.github.io/SGPdata/

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {{SGPdata}: Exemplar Data Sets for Student Growth Percentiles (SGP) Analyses.},
    author = {Damian W. Betebenner and Adam R. {Van Iwaarden} and Benjamin Domingue},
    year = {2024},
    note = {R package version 28.0-0.0},
    url = {https://centerforassessment.github.io/SGPdata/},
  }