To cite package ‘cld’ in publications use:

  Gegzna V (2025). _cld: Create Compact Letter Display (CLD) for
  Statistical Comparisons_. R package version 0.0.1,
  <https://github.com/gegznav/cld>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {cld: Create Compact Letter Display (CLD) for Statistical Comparisons},
    author = {Vilmantas Gegzna},
    year = {2025},
    note = {R package version 0.0.1},
    url = {https://github.com/gegznav/cld},
  }