To cite PowerUpR in publications use:

Bulus M, Dong N, Kelcey B, Spybrook J (2021). PowerUpR: Power Analysis Tools for Multilevel Randomized Experiments. R package version 1.1.0, https://CRAN.R-project.org/package=PowerUpR.

Corresponding BibTeX entry:

  @Manual{,
    title = {{PowerUpR}: Power Analysis Tools for Multilevel Randomized
      Experiments},
    author = {Metin Bulus and Nianbo Dong and Benjamin Kelcey and
      Jessaca Spybrook},
    note = {R package version 1.1.0},
    year = {2021},
    url = {https://CRAN.R-project.org/package=PowerUpR},
  }