To cite package ‘spc’ in publications use:

  Knoth S (2024). _spc: Statistical Process Control - Calculation of
  ARL and Other Control Chart Performance Measures_. R package version
  0.7.1, <https://CRAN.R-project.org/package=spc>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {spc: Statistical Process Control -- Calculation of ARL and Other
Control Chart Performance Measures},
    author = {Sven Knoth},
    year = {2024},
    note = {R package version 0.7.1},
    url = {https://CRAN.R-project.org/package=spc},
  }