To cite package ‘pstratreg’ in publications use:

  Lundberg I, Cho S (2026). _pstratreg: Estimate Bounds via Principal
  Stratification_. R package version 1.0.2,
  <https://CRAN.R-project.org/package=pstratreg>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {pstratreg: Estimate Bounds via Principal Stratification},
    author = {Ian Lundberg and Soonhong Cho},
    year = {2026},
    note = {R package version 1.0.2},
    url = {https://CRAN.R-project.org/package=pstratreg},
  }