To cite package ‘swCRTdesign’ in publications use:

  Hughes J, Hakhu NR, Voldal E, Xia F (2026). _swCRTdesign: Stepped
  Wedge Cluster Randomized Trial (SW CRT) Design_. R package version
  4.2, <https://CRAN.R-project.org/package=swCRTdesign>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {swCRTdesign: Stepped Wedge Cluster Randomized Trial (SW CRT) Design},
    author = {Jim Hughes and Navneet R. Hakhu and Emily Voldal and Fan Xia},
    year = {2026},
    note = {R package version 4.2},
    url = {https://CRAN.R-project.org/package=swCRTdesign},
  }