To cite package ‘Spower’ in publications use:

  Chalmers P (2025). _Spower: Power Analyses using Monte Carlo
  Simulations_. R package version 0.2.3,
  <https://github.com/philchalmers/spower>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {Spower: Power Analyses using Monte Carlo Simulations},
    author = {Phil Chalmers},
    year = {2025},
    note = {R package version 0.2.3},
    url = {https://github.com/philchalmers/spower},
  }