To cite psrwe package use:

  Wang C, Chen W (2026). “psrwe: PS-Integrated Methods for
  Incorporating Real-World Evidence in Clinical Studies.” R Package,
  URL https://cran.r-project.org/package=psrwe.

A BibTeX entry for LaTeX users is

  @Misc{psrwepackage,
    title = {{psrwe}: PS-Integrated Methods for Incorporating Real-World Evidence in Clinical Studies},
    author = {Chenguang Wang and Wei-Chen Chen},
    year = {2026},
    note = {{R} Package, URL https://cran.r-project.org/package=psrwe},
  }