To cite package ‘PH1XBAR’ in publications use:

  Yao Y (2025). _PH1XBAR: Phase I Shewhart X-Bar Chart_. R package
  version 0.11.3, <https://github.com/bolus123/ph1xbar>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {PH1XBAR: Phase I Shewhart X-Bar Chart},
    author = {Yuhui Yao},
    year = {2025},
    note = {R package version 0.11.3},
    url = {https://github.com/bolus123/ph1xbar},
  }