To cite package ‘smartDesign’ in publications use:

  Sinnwell J, He J, Eyman Casey A (2024). _smartDesign: Sequential
  Multiple Assignment Randomized Trial Design_. R package version 0.74,
  <https://CRAN.R-project.org/package=smartDesign>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {smartDesign: Sequential Multiple Assignment Randomized Trial Design},
    author = {Jason Sinnwell and Jun(Jessie) He and Abraham {Eyman Casey}},
    year = {2024},
    note = {R package version 0.74},
    url = {https://CRAN.R-project.org/package=smartDesign},
  }