To cite package ‘gghalves’ in publications use:

  Tiedemann F (2022). _gghalves: Compose Half-Half Plots Using Your
  Favourite Geoms_. R package version 0.1.4,
  <https://github.com/erocoar/gghalves>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {gghalves: Compose Half-Half Plots Using Your Favourite Geoms},
    author = {Frederik Tiedemann},
    year = {2022},
    note = {R package version 0.1.4},
    url = {https://github.com/erocoar/gghalves},
  }