To cite package ‘steppedwedge’ in publications use:

  Kenny A, Arthur D, Ouyang Y (2025). _steppedwedge: Analyze Data from
  Stepped Wedge Cluster Randomized Trials_. R package version 1.0.0,
  <https://CRAN.R-project.org/package=steppedwedge>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {steppedwedge: Analyze Data from Stepped Wedge Cluster Randomized Trials},
    author = {Avi Kenny and David Arthur and Yongdong Ouyang},
    year = {2025},
    note = {R package version 1.0.0},
    url = {https://CRAN.R-project.org/package=steppedwedge},
  }