To cite package ‘PJCcalculator’ in publications use:

  Meng N, Kim J, Orbai A, Zeger S (2025). _PJCcalculator: PROs-Joint
  Contrast (PJC) Calculator_. R package version 0.1.3,
  <https://CRAN.R-project.org/package=PJCcalculator>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {PJCcalculator: PROs-Joint Contrast (PJC) Calculator},
    author = {Ning Meng and Ji Soo Kim and Ana-Maria Orbai and Scott L. Zeger},
    year = {2025},
    note = {R package version 0.1.3},
    url = {https://CRAN.R-project.org/package=PJCcalculator},
  }