To cite package ‘knitrProgressBar’ in publications use:

  Flight RM (2024). _knitrProgressBar: Provides Progress Bars in
  'knitr'_. R package version 1.1.1,
  <https://CRAN.R-project.org/package=knitrProgressBar>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {knitrProgressBar: Provides Progress Bars in 'knitr'},
    author = {Robert M Flight},
    year = {2024},
    note = {R package version 1.1.1},
    url = {https://CRAN.R-project.org/package=knitrProgressBar},
  }