To cite package ‘gpci’ in publications use:

  Tyagi S, Kumar S, Pandey A, Singh B, Tripathi V (2026). _gpci:
  Generalized Process Capability Indices and Bootstrap Confidence
  Intervals_. R package version 0.1.0,
  <https://CRAN.R-project.org/package=gpci>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {gpci: Generalized Process Capability Indices and Bootstrap Confidence
Intervals},
    author = {Shikhar Tyagi and Sumit Kumar and Arvind Pandey and Bhupendra Singh and Vrijesh Tripathi},
    year = {2026},
    note = {R package version 0.1.0},
    url = {https://CRAN.R-project.org/package=gpci},
  }