To cite package ‘legendplot’ in publications use:

  Fernandez-Casal R (2026). _legendplot: Standard and 'rgl' Plots with
  Legends_. R package version 0.4-1,
  <https://github.com/rubenfcasal/legendplot>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {legendplot: Standard and 'rgl' Plots with Legends},
    author = {Ruben Fernandez-Casal},
    year = {2026},
    note = {R package version 0.4-1},
    url = {https://github.com/rubenfcasal/legendplot},
  }