To cite package ‘plotannotate’ in publications use:

  Viechtbauer W (2025). _plotannotate: Annotate Plots_. R package
  version 1.5-0, <https://github.com/wviechtb/plotannotate>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {plotannotate: Annotate Plots},
    author = {Wolfgang Viechtbauer},
    year = {2025},
    note = {R package version 1.5-0},
    url = {https://github.com/wviechtb/plotannotate},
  }