To cite package ‘mapping’ in publications use:

  Serafini A, Ferrara G (2023). _mapping: Automatic Download, Linking,
  Manipulating Coordinates for Maps_. R package version 1.4.1,
  <https://github.com/mappinguniverse/mapping>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {mapping: Automatic Download, Linking, Manipulating Coordinates for Maps},
    author = {Alessio Serafini and Giancarlo Ferrara},
    year = {2023},
    note = {R package version 1.4.1},
    url = {https://github.com/mappinguniverse/mapping},
  }