To cite package ‘guiplot’ in publications use:

  Fu Yongchao (2024). _guiplot: User-Friendly GUI Plotting Tools_. R
  package version 0.5.1, <https://github.com/s0521/guiplot>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {guiplot: User-Friendly GUI Plotting Tools},
    author = {{Fu Yongchao}},
    year = {2024},
    note = {R package version 0.5.1},
    url = {https://github.com/s0521/guiplot},
  }